Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Ruth Byers:
     Mark domains as deprecated in api spec ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/15181400 )
     Fixed a flaky spec and refactored temp file creation ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/15065868 )
     Add deprecated header to requests to spaces' and ogranizations' domains ( Travis Unknown )
     Deprecation header for /v2/domains endpoints ( Travis Unknown )
     Remove delete /v2/organizations/:guid/domains/:guid ( Travis Unknown )
  Tim Labeeuw:
     No domain deletion if there are associated routes ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/15017827 )
     Removed last pending domains test. ( Travis Unknown )
     reenabled spaces-domains relationship ( Travis Unknown )
     Added timecop to a flakey test ( Travis Unknown )
     Restored /v2/organizations/:guid/domains endpoint ( Travis Unknown )
  Alex Suraci:
     remove harmless pending test ( Travis Unknown )
     add private/shared domain model specs ( Travis Unknown )
     remove wildcard concept from domains ( Travis Unknown )
     split Domain into Private and Shared domain ( Travis Unknown )
     remove space <-> domain relationship ( Travis Unknown )
  Lucas Marks:
     removing some WIP code and debugging info ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/15016820 )
     Throw an exception if you try to deal with a service w/o a token ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/15014744 )
  Glenn Oppegard:
     Update API Version Spec checksum ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/15013814 )
  Mike Heath:
     Made use of https consistent. ( Travis Unknown )
     Made https check nil safe. ( Travis Unknown )
     Added HTTPS tests. ( Travis Unknown )
     Add support for using httpS to call service brokers. ( Travis Unknown )
  Aram Price:
     Remove TODOs and FIXMEs ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/14957381 )