Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Abhijit Hiremagalur:
     Simplify run_specs, remove unused behavior ( Travis started: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/26696813 )
     Remove "ci" namespace and run integration tests using the folder ( Travis finished: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/26693585 )
  Alex Stupakov:
     Organize suite by layer ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/26690665 )