Updated openstack/openstack
Project: openstack/tempest-lib  8dd9da1f42f6c8e44a6d17301d391060240bd1b3

Add pretty_tox.sh wrapper script to use subunit-trace

This commit adds a pretty_tox.sh wrapper script for the tempest-lib
unit tests to use subunit-trace when running the tests. This should
make the output a bit more clear and help with future debugging.

Change-Id: I48d670353bb85f7f87a05041bed60ad131555057