Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Ruth:
     Merge pull request #189 from sykesm/trial-be-gone-templates ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/21632611 )
  Aram Price:
     Use X-Vcap-Request-Id instead of X-Request-Id ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/21615810 )
  Karl Isenberg:
     Replaced class methods with instance methods for custom_buildpacks_enabled ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/21614959 )
     spec_helper correctly resets the global config state before every test. ( Travis Unknown )
     Removed trailing newline from encrypted output. ( Travis Unknown )
     Added a rake spec task to execute the standard rspec_parallel command. ( Travis Unknown )
  Matthew Sykes:
     Remove trial_db templates ( Travis Unknown )