Used to be: git.openstack.org/openstack/monasca-persister?h=stable/pike
Now : opendev.org/openstack/monasca-persister/src/branch/stable/pike
Since the way links to specific branches changed, usage of
those links has to be changed as well.
CONSTRAINTS_BRANCH variable was removed because CONSTRAINTS_FILE
contains link to the upper-requirements file with specified branch.
Story: 2005666
Task: 30970
Change-Id: I704cd025d6ccf7e9769a276d6094c4e2f3fb69ef
Michal Piotrowski