Reduce runs in the dumpling-emperor upgrade suite.

Add + to 2-workload, 4-workload and 6-final-workload
suites.  Reduce 5-upgrade-sequence to only run two
tests and make sure upgrades to emperor occur in each
sequence.  Fix swift.yaml to not include rgw: clause
(this is already done by s3tests.yaml).

Fixes: #8051
Signed-off-by: Warren Usui <warren.usui@inktank.com>
Merge pull request #25 from ceph/wip-fastdumpemp-wusui

Reduce runs in the dumpling-emperor upgrade suite.
rados: include objectstore tests

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
rados/thrash: whitelist 'must scrub before tier agent can activate'

Signed-off-by: Sage Weil <sage@inktank.com>
rbd/basic: factor out install + ceph

Signed-off-by: Sage Weil <sage@inktank.com>
rbd: do most tests with a (small) cache pool in front

Signed-off-by: Sage Weil <sage@inktank.com>
rbd/thrash: factor out install + ceph

Signed-off-by: Sage Weil <sage@inktank.com>