Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Chris Piraino and Serguei Filimonov:
     A domain cannot be created if it would overlap with a subdomain. ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/39443279 )
Add -a flag to grep to prevent failures on unexpected characters