Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Abhijit Hiremagalur:
     Use more idiomatic approach for shared examples ( Travis Unknown )
     Set package_hash to image name when docker_image is set ( Travis Unknown )
     Log info instead of warn & error since both conditions can be induced by users ( Travis Unknown )
     Introduce Docker staging completion handler ( Travis Unknown )
  Julian Friedman:
     Feature Flag to disable app scaling ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/32343826 )
     Bump API version ( Travis Unknown )
     App Bits Uploading can be disabled with a feature flag ( Travis Unknown )

Signed-off-by: Peter Parente <pparent@us.ibm.com>