1. fix delete\update case in QE tier 1 testing
2. fix connection crossing issue with connecting with different buckets on the same node.
Change-Id: I00bac00609669e18f10ba4cdb0aba830b942bd80
Reviewed-on: http://review.couchbase.org/44598
Reviewed-by: Yu Sui <ysui68@gmail.com>
Tested-by: Xiaomei Zhang <xiaomeizhangatwork@gmail.com>