
Change relation name in tempest tests for grafana as grafana-dashboard. This is deducted by more checks in ops 1.12.0 and hence the py3 failures. Pass TEST_JUJU3 to tox -e func so that python-libjuju 3.x will be used for zaza tests. Change-Id: Ia99236a847af2b9ed080ddc6405dcff8b817ea30