According to Openstack summit session [1],
stestr is maintained project to which all Openstack projects should migrate.
Let's switch to stestr as other projects have already moved to it.
[1] https://etherpad.openstack.org/p/YVR-python-pti
Change-Id: Icb3886271885bfee19981a6acdda3163f3cd72f8
When running gabbi under testr, concurrency grouping is controlled
by a regex in .testr.conf. A module name change in gabbi 1.22.0
inadvertently broke the grouping. This change should work for
old and new versions.
Change-Id: Ie52d0714a453652f0497d34fb758473755e7bc49