CBQE-1373 expand parameters tested for cbstats tool

Change-Id: I6bb84b18f92bb5f9f972cc2401f8d02001957571
Reviewed-on: http://review.couchbase.org/27931
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Chisheng Hong <chisheng@couchbase.com>