Since we have support checking the mds auth cap in kclient, just
set the feature bit.

Link: https://tracker.ceph.com/issues/61333Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Milind Changire <mchangir@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>