Updated openstack/openstack
Project: openstack/neutron  076a26ae47c0a63682248f50d171676cddfc7360

Show progress output while running unit tests

This patch imports some magic to enable showing test output as the
tests run.  Seeing output showing tests as they execute is reassuring
that the test run is continuing to make progress.  This originated in
tempest and was then brought over to Nova in this commit:

  https://review.openstack.org/#/c/121914/

Note the justification in that commit to just copy it instead of move
it to a shared repo.

To get the old behavior where you only get output when something
fails, you can set the TRACE_FAILONLY env var.  That originated in
this commit in Nova:

  https://review.openstack.org/#/c/123801/

Change-Id: I6a079ad5f630383650c0f9dee09e04250d0e2c5a