glusterd: Save supported op-versions of clients.

Change-Id: I4e6b60b274d5200508762dc0204cfa848a6c0aa4
Signed-off-by: Kaushal M <kaushal@redhat.com>
glusterd: Consider client op-version during volume set
Signed-off-by: Kaushal M <kaushal@redhat.com>

Change-Id: Iea94e8bdffeafba90998b68dd3efd56e4b4f8b2a