CBQE-2344: DML insert and upsert clauses

Change-Id: If34c1dd2973de12f12e5acc19b8ba485e0bd7971
Reviewed-on: http://review.couchbase.org/41910
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: buildbot <build@couchbase.com>