Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Stew Nickolas:
     Extract interchangable Dea/Diego backends ( Travis Unknown )
     Remove redundant namespace ( Travis Unknown )
  Alex Stupakov and Raina Masand:
     Renaming cc_service_broker_client to cc-service-dashboards in templates. ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/31356997 )

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>