CBQE-2529: Add Spatial tests for rebalance, failover

Change-Id: Ic9d47a8c6c6027d812e07f4fd20c1416ecbe7afb
Reviewed-on: http://review.couchbase.org/44625
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>