Fix CI, Drop python2 and 3.5, update jobs to python3
* Starting in mysql8, we can't expect a db user to be
created with the GRANT command, we'll need to create
one explicitly.
* OpenStack has dropped the py2.7 and py3.5 support
in ussuri cycle. From now on, refstack will test only
with py3 jobs. Complete discussion & schedule can be
found in
- http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010142.html
- https://etherpad.openstack.org/p/drop-python2-support
Ussuri Communtiy-wide goal:
https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html
* Replace the "refstack-tox-py36-func-mysql" with
"refstack-tox-functional" to simplify naming and use the system default
python3 version for this functional job.
* replace testr unit test runner by stestr. testr runner hasn't been updated
for ~ 6 years - stestr is its successor
Story: 2003257
Task: 24062
Change-Id: I90ab2eca6366f0b6256f097712efac2ffe08b2c0