Needed for MB-13949 Query needs to know the list of healthy nodes in the cluster
Needed for MB-13949
Query needs to know the list of healthy nodes in the cluster

Change-Id: I4c433c9bf51009c112b5fb1403672dae56f81a1b
Reviewed-on: http://review.couchbase.org/48452
Reviewed-by: Gerald Sangudi <446f6fe420322ac611e4621119ab11e5a51daf2f@couchbase.com>
Tested-by: Manik Taneja <ab0e3979665ad7ee15da870324c623916e4596d3@couchbase.com>

nimishzynga/go-couchbase,couchbase/go-couchbase