Bug 1420813

Description of problem:
When building a report based on 'Chargeback for Projects', if I add a label to the report such as 'gl.project', when I click the filter tab it does not load and there is a nilClass error in the logs. 

Version-Release number of selected component (if applicable):
cfme-5.7.0.17-3.el7cf.x86_64

How reproducible:
This occurs consistently in multiple environments 

Steps to Reproduce:
Pre-requisite: Have an openshift project with a label that has a period in it (such as gl.project).  Have your OpenShift provider synced in CloudForms

1. Go to Cloud Intel -> Reports -> Reports accordion
2. Clik Configuration -> Add a New Report
3. Name / Title: Chargeback Test Report
4. Base report on Chargeback for Projects
5. Choose some base fields:
   - Project uid
   - Provider Name 
   - Total Cost
6. Choose a label field that has a period in it (in my example, gl.project).
7. Click the filter tab 

Actual results:
The tab does not load and gives an error in the log 

Expected results:
The filter tab loads as usual.  Note, if you remove the gl.project label from the report it can then display the filter tab without problems


Additional info:
Here is the relevant detail from the production.log: 

==> production.log <==
[----] F, [2017-02-09T08:43:08.518316 #2856:173b364] FATAL -- : Error caught: [NoMethodError] undefined method `name' for nil:NilClass
/var/www/miq/vmdb/lib/miq_expression.rb:1242:in `build_relats'
/var/www/miq/vmdb/lib/miq_expression.rb:1203:in `get_relats'
/var/www/miq/vmdb/app/models/miq_report.rb:138:in `block in display_filter_details'
/var/www/miq/vmdb/app/models/miq_report.rb:125:in `each'
/var/www/miq/vmdb/app/models/miq_report.rb:125:in `inject'
/var/www/miq/vmdb/app/models/miq_report.rb:125:in `display_filter_details'
/var/www/miq/vmdb/app/controllers/report_controller/reports/editor.rb:221:in `build_edit_screen'
/var/www/miq/vmdb/app/controllers/report_controller/reports/editor.rb:103:in `miq_report_edit'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/abstract_controller/base.rb:188:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal/rendering.rb:30:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:126:in `call'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:455:in `call'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/abstract_controller/callbacks.rb:19:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal/rescue.rb:20:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/notifications.rb:164:in `block in instrument'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/notifications.rb:164:in `instrument'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal/params_wrapper.rb:248:in `process_action'
/opt/rh/cfme-gemset/gems/activerecord-5.0.0.1/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/abstract_controller/base.rb:126:in `process'
/opt/rh/cfme-gemset/gems/actionview-5.0.0.1/lib/action_view/rendering.rb:30:in `process'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal.rb:190:in `dispatch'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_controller/metal.rb:262:in `dispatch'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/routing/route_set.rb:32:in `serve'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/journey/router.rb:39:in `block in serve'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/journey/router.rb:26:in `each'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/journey/router.rb:26:in `serve'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/routing/route_set.rb:725:in `call'
/opt/rh/cfme-gemset/gems/secure_headers-3.0.3/lib/secure_headers/middleware.rb:10:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/etag.rb:25:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/conditional_get.rb:25:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/head.rb:12:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/session/abstract/id.rb:222:in `context'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/session/abstract/id.rb:216:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/cookies.rb:613:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/callbacks.rb:36:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
/opt/rh/cfme-gemset/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:36:in `call_app'
/opt/rh/cfme-gemset/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:26:in `call'
/opt/rh/cfme-gemset/gems/request_store-1.3.1/lib/request_store/middleware.rb:9:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/request_id.rb:24:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/method_override.rb:22:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/runtime.rb:22:in `call'
/opt/rh/cfme-gemset/gems/activesupport-5.0.0.1/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
/opt/rh/cfme-gemset/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/executor.rb:12:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.1/lib/rack/sendfile.rb:111:in `call'
/opt/rh/cfme-gemset/gems/railties-5.0.0.1/lib/rails/engine.rb:522:in `call'
/opt/rh/rh-ruby23/root/usr/share/gems/gems/puma-3.3.0/lib/puma/configuration.rb:224:in `call'
/opt/rh/rh-ruby23/root/usr/share/gems/gems/puma-3.3.0/lib/puma/server.rb:561:in `handle_request'
/opt/rh/rh-ruby23/root/usr/share/gems/gems/puma-3.3.0/lib/puma/server.rb:406:in `process_client'
/opt/rh/rh-ruby23/root/usr/share/gems/gems/puma-3.3.0/lib/puma/server.rb:271:in `block in run'
/opt/rh/rh-ruby23/root/usr/share/gems/gems/puma-3.3.0/lib/puma/thread_pool.rb:111:in `block in spawn_thread'
[----] I, [2017-02-09T08:43:08.519412 #2856:173b364]  INFO -- :   Rendered layouts/_exception_contents.html.haml (0.1ms)
[----] I, [2017-02-09T08:43:08.519927 #2856:173b364]  INFO -- : Completed 200 OK in 19ms (Views: 1.1ms | ActiveRecord: 0.0ms)