There was a race condition associated with maintaining the
CM_FILELOCK_FLAG_CLIENTONLY flag on locks bound to scache entries
for Read Only volumes. Therefore, we remove the use of the flag
and simply test the RO status of the scache entry.
(cherry picked from commit 2dcb1cdc3d6f10b366d2b93970f5f1f83287e157)
70f54edf7b