[qa][stable][gate] Tempest master failing on stable/yoga|xena, fix is in gate

Hi All, In case any of you are seeing failure on stable/yoga and stable/xena with the below error, please hold the recheck until the fix (revert) in Tempest is merged "AttributeError: type object 'Draft4Validator' has no attribute 'FORMAT_CHECKER'" - https://review.opendev.org/c/openstack/tempest/+/876218 -gmann