Reduce MDS count to 1

[ksingh7]

Feature Request : Reduce MDS count to 1

NAME                                                              READY   STATUS      RESTARTS   AGE
rook-ceph-mds-ocs-storagecluster-cephfilesystem-a-6d9f556dnnxzr   1/1     Running     0          45h
rook-ceph-mds-ocs-storagecluster-cephfilesystem-b-7f7b77d6dv4pp   1/1     Running     0          45h