CBIDXT-128 Support Multiple KV Nodes

Change-Id: I69996e637abbed3ef525990bc3c7293b5d34245e
Reviewed-on: http://review.couchbase.org/40910
Reviewed-by: John Liang <johliang00@gmail.com>
Reviewed-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>
Tested-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>