OSDMonitor: fix quorum_features comparison in check_cluster_features

We need to see if there's a feature which is not in the quorum_features,
not if there are no features in common!

Signed-off-by: Greg Farnum <greg@inktank.com>
mon: check changes to the whole CRUSH map and to tunables against cluster features

When we change the tunables, or set a new CRUSH map, we need to make sure it's
supported by all the monitors and OSDs currently participating in the cluster.

Fixes: #8738

Signed-off-by: Greg Farnum <greg@inktank.com>
Merge pull request #2072 from ceph/wip-8738-next

Patch up the CRUSH map compatibility guards

Reviewed-by: Loic Dachary <loic@dachary.org>
Reviewed-by: Joao Eduardo Luis <joao.luis@inktank.com>
Reviewed-by: Sage Weil <sage@redhat.com>