CBQE-0 increase wait time for in/uninstall windows completed

Change-Id: I2ace7cc4ac1f360adf052d1989ed72424c2e441a
Reviewed-on: http://review.couchbase.org/40146
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>