Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Jimmy Da and Matt Royal:
     Operator and broker can now update unique_id ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14503327 )
  phanle:
     Limit log file size, and default to info ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14453945 )
  Eric Malm:
     Move #async? and #recursive? methods to Base ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14398936 )
     Cleanup naming and use ruby-isms ( Travis Unknown )
     Use idiomatic ruby and be less verbose ( Travis Unknown )
     Stop stubbing #v2_api? on the class under test ( Travis Unknown )
     ModelController has #async? method ( Travis Unknown )
     ModelController has #recursive? method ( Travis Unknown )
     Cleanup style and convert hashes to 1.9 syntax ( Travis Unknown )
     Revert "RestController no longer supports #after_destroy" ( Travis Unknown )
     Inline callbacks where we override ModelController ( Travis Unknown )
     RestController no longer supports #after_destroy ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14394720 )
     Refactor specs ( Travis Unknown )
     Buildpack blobstore deletion is now async ( Travis Unknown )