CBQE-0:fix query tests for dgm scenario and destructive failover tests


1) Our high dgm scenarios were timing out due to longer wait times and changed item counts. 
Test Run Example for Queries with high dam

Rebalance-in:: https://friendpaste.com/2TF94gnH8t8CgnPcRrbk8I

Rebalance-out:: https://friendpaste.com/2TF94gnH8t8CgnPcRrTNt4

Failover:: https://friendpaste.com/2TF94gnH8t8CgnPcRrTMwo

Change-Id: Icf546000aba647f8dc9b0ffefb1f56dae9fabe83

2) Failover scenarios have been broken into two conf files and placed in a directory structure 'failover' This will give more structure to the tests.

Change-Id: Icf546000aba647f8dc9b0ffefb1f56dae9fabe83
Reviewed-on: http://review.couchbase.org/40890
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>