Fixes #9729, running incompatible tests while the cluster is mixed between firefly and dumpling
Changed to rados/test-upgrade-firefly.sh version

Signed-off-by: Yuri Weinstein <yuri.weinstein@inktank.com>
Added client.0 upgrade to firefly step

Signed-off-by: Yuri Weinstein <yuri.weinstein@inktank.com>
Added print

Signed-off-by: Yuri Weinstein <yuri.weinstein@inktank.com>
Merge pull request #192 from ceph/wip-9729

Wip 9729

Reviewed-by: Josh Durgin <josh.durgin@inktank.com>