Description of problem:
------------------------
The UI blows up with this error while accessing saved reports.

Error text:
undefined method `x_get_child_nodes' for TreeBuilder:Class [report/get_report]

Snippet from production.log:
[----] F, [2015-11-09T14:55:10.215621 #2969:1245990] FATAL -- : Error caught: [NoMethodError] undefined method `x_get_child_nodes' for TreeBuilder:Class
/var/www/miq/vmdb/app/controllers/application_controller/explorer.rb:220:in `tree_add_child_nodes'
/var/www/miq/vmdb/app/controllers/report_controller.rb:680:in `open_parent_nodes'
/var/www/miq/vmdb/app/controllers/report_controller.rb:713:in `replace_right_cell'
/var/www/miq/vmdb/app/controllers/report_controller.rb:279:in `get_report'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/abstract_controller/base.rb:198:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/rendering.rb:10:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/abstract_controller/callbacks.rb:19:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/rescue.rb:29:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/notifications.rb:164:in `block in instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activesupport/lib/active_support/notifications.rb:164:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/activerecord/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/abstract_controller/base.rb:137:in `process'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionview/lib/action_view/rendering.rb:30:in `process'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal.rb:196:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_controller/metal.rb:237:in `block in action'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_dispatch/routing/route_set.rb:76:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-a37d0e57571f/actionpack/lib/action_dispatch/routing/route_set.rb:45:in `serve'



Version-Release number of selected component (if applicable):
------------------------
5.5.0.9


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


Steps to Reproduce:
-------------------
1.Navigate to Cloud Intelligence->Reports.Click the 'Saved Reports' accordion.
2.Click any of the Saved reports on the right.


Actual results:
---------------


Expected results:
-----------------


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