Fix gate

By using fixed openstack-governance from Git repo.
The upstream was fixed already [1] but the release cannot be made
as this is where it would be done from.

This patch also amends tox.ini to always install deps from
requirements.txt, otherwise the git repository reference
is simply ignored.

[1] https://review.opendev.org/c/openstack/governance/+/809430

Change-Id: Id711996f90687235624f82fa64e79fb0b5204073

requirements.txt

@@ -33,4 +33,4 @@ pyfiglet>=0.7.5
 appdirs
 packaging>=16.5
 
-openstack-governance>=0.7.0  # Apache 2.0
+git+https://opendev.org/openstack/governance@master#egg=openstack-governance  # Apache 2.0

tox.ini

@@ -20,7 +20,9 @@ setenv =
    OS_DEBUG=1
    OS_LOG_CAPTURE=1
 basepython = python3
-deps = -r{toxinidir}/test-requirements.txt
+deps =
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/test-requirements.txt
 commands =
     stestr run {posargs}
     coverage combine