Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Mike Dalessio:
     Revert "Upgrade to ruby 2.1.2" ( Travis started: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33946974 )
     Revert "Reverting mysql to 0.3.13 due to "undefined symbol" issue during deploy" ( Travis Unknown )