ceph: add check for snapshotter deployment
ceph: add check for snapshotter deployment

as we need kubernetes v1.17+ for snapshotter
to work,Added code changes to disable snapshotter
sidecar deployment by default if the kubernetes version
is less than v1.17+

Signed-off-by: Madhu Rajanna <60fbf37a92c2a0908e31296d18dadbec5a4dae17@gmail.com>

rook/nfs,rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook,rook/rook,rook/nfs