Bump src/cloud_controller_ng:

Amit Gupta and Dmitriy Kalinin (2):
      stager: add upload and download to the droplet and buildpack_cache uris so that nginx doesn't swallow download requests from deas
      fixed quota definition flaky test

Mark Rushakoff and Tim Labeeuw (1):
      Fix .ruby-version

Bump src/dea_next:

Mark Rushakoff and Tim Labeeuw (2):
      Removed rvm out of gitignore
      Fix .ruby-version

Bump src/health_manager_next:

Mark Rushakoff and Tim Labeeuw (2):
      Use .ruby-version
      Fix .ruby-version

Bump src/tests:

Mark Rushakoff and Tim Labeeuw (1):
      Fix .ruby-version

Bump src/tools:

Mark Rushakoff and Tim Labeeuw (2):
      Use .ruby-version
      Fix .ruby-version
Add update_sub script for convenience