subunit-trace needs colors

[Matthew Treinish]

There are some people who like colored output. While this doesn't work for the OpenStack gate for local testing it would be nice to appease those folks and have a --color flag that adds different colors on the console output from subunit-trace

[Masayuki Igawa (igawa)]

Fix proposed
https://review.openstack.org/#/c/249005/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/249005
Committed: https://git.openstack.org/cgit/openstack/os-testr/commit/?id=1a3d0d9ec0ea328e508eb21e2c1ab859ede42d46
Submitter: Jenkins
Branch: master

commit 1a3d0d9ec0ea328e508eb21e2c1ab859ede42d46
Author: Masayuki Igawa <email address hidden>
Date: Tue Nov 24 13:46:46 2015 +0900

    Add colored output feature to subunit-trace

    This commit enables that subunit-trace shows colored output. Because
    there are some people who like colored output. While this doesn't work
    for the OpenStack gate for local testing it would be nice to appease
    those folks and have a --color flag that adds different colors on the
    console output from subunit-trace.

    Change-Id: Iac48591786d10c908d63e6df94b979ded7d8dbe1
    Closes-Bug: #1519044