rgw: fix multi-region test in verify suite

This only syncs metadata, since it tests two regions.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
expanding upgrade suites to include emperor.

Signed-off-by: tamil <tamil.muthamizhan@inktank.com>
(cherry picked from commit 6afe65399a364b6e855b094cca3f677c44dc8faf)
added fs:xfs to the tests

Signed-off-by: tamil <tamil.muthamizhan@inktank.com>