Clean up rebalance-status documentation
Clean up rebalance-status documentation

Change-Id: Ia996687c118f7ed40b7922da5ae880ce6e490d85
Reviewed-on: http://review.couchbase.org/81538
Reviewed-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>
Tested-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>

couchbase/couchbase-cli,couchbase/couchbase-cli