Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Graeme Davison and Zach Robinson:
     Extracted app memory calculation for quotas into separate class. ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33846800 )
  Michael Fraenkel:
     Stopped apps no longer count against org and space quotas. ( Travis Unknown )