Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Mark Rushakoff & Phan Le:
     Fixed a race condition when a job is picked up by 2 workers ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13185441 )
     Fix broken event spec ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13166805 )
     Fix broken API specs ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13165577 )
     Be explicit about request in delete audits ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13165360 )
  Mark Rushakoff & Matthew Sykes:
     Fix broken model_controller specs ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13067909 )
     Add API documentation for spaces ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13067771 )
     Ensure space/org guids in audit.space.delete ( Travis Unknown )
     Add audit logs for spaces ( Travis Unknown )
     Refactor auditing in app controller ( Travis Unknown )
     Call {before,after}_update from update ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13064381 )
     Remove what appears to be mistake code ( Travis Unknown )
     Backfill tests for ModelController ( Travis Unknown )
     Backfill specs for model_controller ( Travis Unknown )
     Make {Create,Response,Update}Message greppable ( Travis Unknown )
     Add request field in app delete audit record ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13013615 )
     Initial documentation of audit events in API doc. ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13013168 )
     Fix schema and broken test ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/13012329 )
     Fix broken tests ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/12962342 )
     Track recursiveness in app deletion audit ( Travis Unknown )
     Add auditing for app creation ( Travis Unknown )
     Test audit log for app delete ( Travis Unknown )
     Include request params in audit log for app update ( Travis Unknown )
  Phan Le and Ryan Tang:
     Added a debugging message to help us debugging tests only failing on Travis ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/12997847 )