Updated openstack/openstack
Project: openstack/nova  757ce1049f36eeba1245e23ca4ec47e4d223c842

Add better coverage support under tox

For those in the community who don't use run_tests.sh but want
tox to have coverage support this small change should help.  It
adds coverage erase, combine, html reporting.  It also
fixes the coverage unit tests in two ways.  The first is
adding the locking like normal unit tests. The second
is adding substring regular expression matching to pick
a subset of tests.  This brings it up to closer par with
run_tests.sh.

Change-Id: If9ea229425dc9a191fa7c5cc073cf5da412a69b7