Description of problem:
Forgot Username functionality failed

Version-Release number of selected component (if applicable):
* candlepin-0.8.25-1.el6sam.noarch
* candlepin-scl-1-5.el6_4.noarch
* candlepin-scl-quartz-2.1.5-5.el6_4.noarch
* candlepin-scl-rhino-1.7R3-1.el6_4.noarch
* candlepin-scl-runtime-1-5.el6_4.noarch
* candlepin-selinux-0.8.25-1.el6sam.noarch
* candlepin-tomcat6-0.8.25-1.el6sam.noarch
* elasticsearch-0.19.9-8.el6sat.noarch
* katello-candlepin-cert-key-pair-1.0-1.noarch
* katello-certs-tools-1.4.2-2.el6sat.noarch
* katello-cli-1.4.3-10.el6sat.noarch
* katello-cli-common-1.4.3-10.el6sat.noarch
* katello-common-1.4.3-12.el6sam_splice.noarch
* katello-configure-1.4.4-4.el6sat.noarch
* katello-glue-candlepin-1.4.3-12.el6sam_splice.noarch
* katello-glue-elasticsearch-1.4.3-12.el6sam_splice.noarch
* katello-headpin-1.4.3-12.el6sam_splice.noarch
* katello-headpin-all-1.4.3-12.el6sam_splice.noarch
* katello-selinux-1.4.4-2.el6sat.noarch
* thumbslug-0.0.34-1.el6sam.noarch
* thumbslug-selinux-0.0.34-1.el6sam.noarch


How reproducible:
Always

Steps to Reproduce:
1. From login screen, click Forgot Username link
2. Enter email address and click "Send Login"

Actual results:
There is no response in UI. But a stacktrace is found in log:

==> /var/log/katello/production.log <==
[ERROR 2013-09-11 19:10:53 app cafea46bbdaac2230bb0a16973cce002 #22890] undefined local variable or method `user' for #<UserMailer:0x00000007a2a2e0> (NameError)
 | /usr/share/katello/app/mailers/user_mailer.rb:25:in `send_logins'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/base.rb:167:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/base.rb:121:in `process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/rendering.rb:45:in `process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionmailer-3.2.8/lib/action_mailer/base.rb:457:in `process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionmailer-3.2.8/lib/action_mailer/base.rb:452:in `initialize'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionmailer-3.2.8/lib/action_mailer/base.rb:439:in `new'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionmailer-3.2.8/lib/action_mailer/base.rb:439:in `method_missing'
 | /usr/share/katello/app/controllers/password_resets_controller.rb:72:in `email_logins'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/base.rb:167:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/rendering.rb:10:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/callbacks.rb:18:in `block in process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:470:in `block in _run__1233811276757154620__process_action__990359911097123577__callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:215:in `block in _conditional_callback_around_3478'
 | /usr/share/katello/app/lib/util/thread_session.rb:104:in `thread_locals'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:214:in `_conditional_callback_around_3478'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:436:in `_run__1233811276757154620__process_action__990359911097123577__callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/callbacks.rb:17:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/rescue.rb:29:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/notifications.rb:123:in `block in instrument'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/notifications.rb:123:in `instrument'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/instrumentation.rb:29:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/base.rb:121:in `process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/abstract_controller/rendering.rb:45:in `process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal.rb:203:in `dispatch'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_controller/metal.rb:246:in `block in action'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:73:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:36:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/journey-1.0.4/lib/journey/router.rb:68:in `block in call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/journey-1.0.4/lib/journey/router.rb:56:in `each'
 | /opt/rh/ruby193/root/usr/share/gems/gems/journey-1.0.4/lib/journey/router.rb:56:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:600:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/apipie-rails-0.0.18/lib/apipie/static_dispatcher.rb:56:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/warden-1.0.3/lib/warden/manager.rb:35:in `block in call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/warden-1.0.3/lib/warden/manager.rb:34:in `catch'
 | /opt/rh/ruby193/root/usr/share/gems/gems/warden-1.0.3/lib/warden/manager.rb:34:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-openid-1.3.1/lib/rack/openid.rb:98:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/sass-3.1.20/lib/sass/plugin/rack.rb:54:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/etag.rb:23:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/conditionalget.rb:35:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/head.rb:14:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/params_parser.rb:21:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/flash.rb:242:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/session/abstract/id.rb:205:in `context'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/session/abstract/id.rb:200:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/cookies.rb:339:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/query_cache.rb:64:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `_run__3804503131954660923__call__3120940270325937768__callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/railties-3.2.8/lib/rails/rack/logger.rb:26:in `call_app'
 | /opt/rh/ruby193/root/usr/share/gems/gems/railties-3.2.8/lib/rails/rack/logger.rb:16:in `call'
 | /usr/share/katello/lib/katello/middleware/log_request_uuid.rb:22:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/request_id.rb:22:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/methodoverride.rb:21:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/runtime.rb:17:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/activesupport-3.2.8/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/lock.rb:15:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/actionpack-3.2.8/lib/action_dispatch/middleware/static.rb:62:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-cache-1.2/lib/rack/cache/context.rb:136:in `forward'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-cache-1.2/lib/rack/cache/context.rb:143:in `pass'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-cache-1.2/lib/rack/cache/context.rb:155:in `invalidate'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-cache-1.2/lib/rack/cache/context.rb:71:in `call!'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-cache-1.2/lib/rack/cache/context.rb:51:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/railties-3.2.8/lib/rails/engine.rb:479:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/railties-3.2.8/lib/rails/application.rb:223:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/railties-3.2.8/lib/rails/railtie/configurable.rb:30:in `method_missing'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/builder.rb:134:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/urlmap.rb:64:in `block in call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/urlmap.rb:49:in `each'
 | /opt/rh/ruby193/root/usr/share/gems/gems/rack-1.4.1/lib/rack/urlmap.rb:49:in `call'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/connection.rb:80:in `block in pre_process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/connection.rb:78:in `catch'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/connection.rb:78:in `pre_process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/connection.rb:53:in `process'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/connection.rb:38:in `receive_data'
 | /opt/rh/ruby193/root/usr/share/gems/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine'
 | /opt/rh/ruby193/root/usr/share/gems/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/backends/base.rb:61:in `start'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/server.rb:159:in `start'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/controllers/controller.rb:86:in `start'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/runner.rb:185:in `run_command'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/lib/thin/runner.rb:151:in `run!'
 | /opt/rh/ruby193/root/usr/share/gems/gems/thin-1.3.1/bin/thin:6:in `<top (required)>'
 | /usr/share/katello/script/thin:24:in `load'
 | /usr/share/katello/script/thin:24:in `<main>'


Expected results:


Additional info: