Call pool_renamed only if the pool has filesystems
Call pool_renamed only if the pool has filesystems

If it does not have filesystems, then it should not have a directory for
the filesystem links, and pool_renamed will return an error, erroneously.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

stratis-storage/stratisd,stratis-storage/stratisd,stratis-storage/stratisd