Extend test-datatype to test set_with_meta

Change-Id: I42efab4d11d5db97abda33f9ec106ee469604608
Reviewed-on: http://review.couchbase.org/35020
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>