Add MapUserType to support converstion between Map and hstore (#443)

db/src/main/resources/sql/schema/nomulus.golden.sql

@@ -16,6 +16,20 @@ SET xmloption = content;
 SET client_min_messages = warning;
 SET row_security = off;
 
+--
+-- Name: hstore; Type: EXTENSION; Schema: -; Owner: -
+--
+
+CREATE EXTENSION IF NOT EXISTS hstore WITH SCHEMA public;
+
+
+--
+-- Name: EXTENSION hstore; Type: COMMENT; Schema: -; Owner: -
+--
+
+COMMENT ON EXTENSION hstore IS 'data type for storing sets of (key, value) pairs';
+
+
 SET default_tablespace = '';
 
 SET default_with_oids = false;