Bug 1377879

Description of problem:
-----------------------
The CFME blows up with this error while viewing C&U graphs for Azure availability zones.


Snippet from production.log

[----] I, [2016-09-19T16:55:30.153993 #3034:eadad0]  INFO -- : Started POST "/availability_zone/perf_chart_chooser/1?miq_date_1=" for 127.0.0.1 at 2016-09-19 16:55:30 -0400
[----] I, [2016-09-19T16:55:30.155870 #3034:eadad0]  INFO -- : Processing by AvailabilityZoneController#perf_chart_chooser as JS
[----] I, [2016-09-19T16:55:30.156032 #3034:eadad0]  INFO -- :   Parameters: {"miq_date_1"=>"", "id"=>"1"}
[----] F, [2016-09-19T16:55:30.222783 #3034:eadad0] FATAL -- : Error caught: [ArgumentError] invalid date
/opt/rh/cfme-gemset/gems/american_date-1.1.1/lib/american_date.rb:26:in `parse'
/opt/rh/cfme-gemset/gems/american_date-1.1.1/lib/american_date.rb:26:in `parse'
/var/www/miq/vmdb/app/controllers/application_controller/performance.rb:685:in `perf_gen_data_before_wait'
/var/www/miq/vmdb/app/controllers/application_controller/performance.rb:668:in `perf_gen_data'
/var/www/miq/vmdb/app/controllers/application_controller/performance.rb:42:in `perf_chart_chooser'
/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: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: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/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:38: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__'


Version-Release number of selected component (if applicable):
-----------------------
5.6.2.0


How reproducible:
-----------------
Always


Steps to Reproduce:
-------------------
1)Enable C&U collection for Azure
2)From the summary page of an Availability zone, click Monitoring --> Utilization to View C&U graphs for the availability zone.
3)Make sure daily roll up hasn't occurred for the VMs in that zone.IOW, ensure C&U data has  been captured for *less* than 24 hours.
4)While viewing the C&U graphs, select the 'daily' interval, 
5)Click on  Calendar (to select a day for metrics display)
6)Do not select any day
7)Click on the page - to close the calendar selection


Actual results:
---------------
UI blows up.


Expected results:
-----------------
No errors


Additional info:
------------------