Bump src/cloud_controller_ng:

David Sabeti and Gregg Van Hove (3):
      [#50024577] rescue from failed refresh, since the app seems to be going away sometimes in the yetis. Still looking at why that is
      Revert "Merge branch 'youngm-OracleSupportSingleCommit'"
      log a message for debugging why app is going away

Gregg Van Hove and Tony Hansmann (1):
      add migrations from oracle patch that ran successfully

Jon Stevens and Kowshik Prakasam (1):
      Run travis tests only for master branch