Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Eric Malm:
     Rename methods in cloud_controller/runner to clear things up. ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14838607 )
     Rename MessageBus{Configurer,}::Configurer ( Travis Unknown )
     Rename configure in Config ( Travis Unknown )
     Move db_encryption_key to the Encryptor ( Travis Unknown )
     Refactor migrations and background workers startup. ( Travis Unknown )
     Start message bus in a thread so that the DelayedJob main thread does not starve EventMachine ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14679185 )
     Refactor a AppStopper which can be used in background jobs. ( Travis Unknown )
     Try allow_failures without ruby prefix ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14616906 )
     Swap ruby version so that 1.9.3 can hopefully be picked up first ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14614246 )
     Add 1.9.3 back, and allow failures in for p484 awaiting travis update. ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14614074 )
  Alex Jackson:
     update loggregator emitter lib ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14835518 )
     upgrade loggregator lib to version 2.0.1 ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14820230 )
  Chris Adams and Ian Lesperance:
     Properly escape pagination URLs ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14631330 )
  Alex Suraci:
     remove dead code ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14615507 )
  Tim Labeeuw:
     Move the Snapshot Controller to Services ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14579074 )
     Removed rest_controller metaprogramming. ( Travis Unknown )
     Added the aysnc command to the request params. ( Travis Unknown )
     Concrete ModelControllers implement #delete explicitly. ( Travis Unknown )
     Regrouped controller route bindings. ( Travis Unknown )
     Added tests for ModelController#find_guid_and_validate_access ( Travis Unknown )