Bump src/cloud_controller_ng:

Alex Suraci and Gregg Van Hove (1):
      support for using a CDN for droplet download URIs

David Sabeti (3):
      Add more explicit test for quota_def permissions
      CC returns a 403 instead of 400 when a non-CF-admin tries to change an     org's quota definition. [finshes #51363065]
      Fix bug in organization validation
cc job/package changes to support cdn config
Bump src/tests:

Jon Stevens and Tony Hansmann (1):
      remove overly specific java test
Bump src/cloud_controller_ng:

Alex Suraci and Gregg Van Hove (1):
      don't configure CDN signing if no private key is set