qa: inherit RunCephCmd in CephTestCase instead of CephFSTestCase
MgrTestCase also needs RunCephCmd. If RunCephCmd is inherited by
CephTestCase, instead of CephFSTestCase, MgrTestCase will automatically
inherit RunCephCmd because it inhertis CephTestCase.
Fixes: https://tracker.ceph.com/issues/62084
Signed-off-by: Rishabh Dave <ridave@redhat.com>
(cherry picked from commit
4b369cf18ed1391a426ab4ae86da834e9c074f81)
Conflicts:
qa/tasks/cephfs/cephfs_test_case.py
qa/tasks/cephfs/filesystem.py
Minor conflicts related to missing backports.