Use stable constraint for Tempest pinned stable branches
Stable branches till stable/rocky is using python
version <py3.6. Tempest test those branch in venv
but Tempest tox use the master upper-constraint
which block installation due to dependencies
require >=py3.6. For exmaple, oslo.concurrency 4.0.0
is not compatible for <py3.6.
As we pin Tempest for EM stable brach, we should be
able to use stable constraint for Tempest installation
as well as while running during run-tempest playbook.
tox.ini is hard coded to use master constraint which force
run-tempest to recreate the tox env and use the master constraint.
Fix for that- https://review.opendev.org/#/c/705870/
nova-live-migration test hook run_test.sh needs to use the stable
u-c so that Tempest installation in venv will use stable
Modify the irrelevant-files for nova-live-migration job to run
for run_test.sh script.