Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Matthew Sykes:
     Reduce the cost of initializing a blobstore connection ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/29727396 )

[#74825494]

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>