indexer: Change queryport to 7000 to avoid conflicts

Avoid port range conflicts with projector during cluster_run

Change-Id: Ib4cfe5469d6830eb3218c92c7bd0a177a812f693
Reviewed-on: http://review.couchbase.org/43392
Reviewed-by: Sarath Lakshman <sarath@couchbase.com>
Tested-by: Sarath Lakshman <sarath@couchbase.com>