[BP] Increase grace period for tap tests & xdcr tests
[BP] Increase grace period for tap tests & xdcr tests

- Tap tests: From 120 to 180
- XDCR tests: From 30 to 120

Change-Id: Ie2228aa53684e4ad94ea5d8979521a77bca8b30b
Reviewed-on: http://review.couchbase.org/62174
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

daverigby/ep-engine,daverigby/kv_engine,hisundar/ep-engine,daverigby/kv_engine,teligent-ru/ep-engine,owendCB/ep-engine,daverigby/kv_engine,owendCB/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,membase/ep-engine,membase/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,hisundar/ep-engine,hisundar/ep-engine,membase/ep-engine,couchbase/ep-engine,membase/ep-engine,couchbase/ep-engine,daverigby/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,couchbase/ep-engine,daverigby/ep-engine,daverigby/kv_engine,couchbase/ep-engine,daverigby/ep-engine