Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Chris Adams:
     Re-enable non_transactional for a spec that broke ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/25197387 )

Signed-off-by: Sabha Parameswaran <sparameswaran@gopivotal.com>