CBSE-351: Wait for node ready when create bucket

When creating a bucket, query all node status for this bucket and
return when all nodes are healthy, i.e. vbuckets are ready to use

Change-Id: Ie572aacee9d7a4e2e04339c5a94297b86240c403
Reviewed-on: http://review.couchbase.org/24145
Reviewed-by: Steve Yen <steve.yen@gmail.com>
Tested-by: Bin Cui <bin.cui@gmail.com>
Reviewed-on: http://review.couchbase.org/24325
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Bin Cui <bin.cui@gmail.com>