Use setCas() in validator tests
Use setCas() in validator tests

Change-Id: I67dbd2fdcdad1c3f212b600cb06bba97c29fe332
Reviewed-on: http://review.couchbase.org/119894
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: James Harrison <5c25a7b3db09830813688775bfc8e6de736a230c@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine