Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Karl Isenberg:
     Reduce the amount of non-transactional tests ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/25176394 )
  James Myers:
     Rake task to simulate Jenkins test runs ( Travis Unknown )

Signed-off-by: Chris Adams <cadams@pivotallabs.com>