CBQE-0: increase timeout for stopping rebalance for viewqueries

Change-Id: Ia8d875af9513920ee94d3667d5e9335dbe99cfdb
Reviewed-on: http://review.couchbase.org/34463
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Meenakshi Goel <meenakshi.goel@globallogic.com>