ceph: properly propagate errors when deleting mds
ceph: properly propagate errors when deleting mds

When deleting mds deployment the error is logged, but not propagated
further down (it always returns nil). The two places using the function
checks the error, and acts upon it.

Signed-off-by: Odin Ugedal <a12bf2c17c422acccb707fa811f07e743a9293d8@ugedal.com>

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