Remove remaining references to `api_version`

* This is hardcoded now; please see
  https://github.com/cloudfoundry/cloud_controller_ng/commit/353149689f680dde6f8a67ee015dabd3ee1f9e9b
  for more info

[delivers #67804418]

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Chris Adams:
     Add an endpoint to restage the app ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/23230972 )
  Phan Le:
     Trying to fix a flakey test. ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/23220270 )

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>
Bump src/dea_next

Bump cloudfoundry/dea_ng:
  Eric Malm:
     Merge remote-tracking branch 'origin/pr/120' ( Travis Unknown )
  fraenkel:
     Add a way to wait for all parallel promises to complete ( Travis Unknown )

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Revert "Bump src/cloud_controller_ng" and "Bump src/dea_next"

This reverts commit 555b4bed4cdb36602d5c3480be13400918577022.
This reverts commit c56723db1af854ca27c6b19ab96b43661ce646a8.

Signed-off-by: James Myers <jmyers@pivotallabs.com>
Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  James Myers:
     Revert "Add an endpoint to restage the app" ( Travis Unknown )
  David Sabeti and Derek Richard:
     Fix the build ( Travis started: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/23248639 )
     Update error message during broker create/update ( Travis Failed: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/23245648 )
  Chris Adams:
     Add an endpoint to restage the app ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/23230972 )

Signed-off-by: James Myers <jmyers@pivotallabs.com>