CBQE:0 Remove dependency on active_vbreps in pause-resume tests

Change-Id: Ifba78abc7b5803f6332450334b8dfbe78d5be0ce
Reviewed-on: http://review.couchbase.org/43333
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Aruna Piravi <aruna@couchbase.com>