Add transactional support for HSQLDB

@@ -14,6 +14,9 @@
 -- limitations under the License.
 --
 
+SET DATABASE SQL SYNTAX PGS TRUE;
+SET DATABASE TRANSACTION CONTROL MVCC;
+
 CREATE TABLE IF NOT EXISTS admin_settings (
     id uuid NOT NULL CONSTRAINT admin_settings_pkey PRIMARY KEY,
     created_time bigint NOT NULL,

@@ -15,6 +15,7 @@
 --
 
 SET DATABASE SQL SYNTAX PGS TRUE;
+SET DATABASE TRANSACTION CONTROL MVCC;
 
 CREATE TABLE IF NOT EXISTS ts_kv (
     entity_id uuid NOT NULL,