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: I761feb4cfcdc9347cd3f74b8b355c28476301127
The name os-config-applier was too confusing given os-refresh-config as the
partner program, so we've decided to rename to os-apply-config.
To aid migration the old command name and default template path are still
supported.
Change-Id: I39725595275e7b4375ac4fda52e6a14b7071f7e9