update sample sql for schema 2.1.0. Fixes #719 (#723)

cf https://github.com/geosolutions-it/geostore/blob/master/doc/sql/migration/postgresql/postgresql-migration-from-v.2.0.0-to-v2.1.0.sql

database/001_mapstore.sql

@@ -37,6 +37,9 @@ create table gs_resource (
     metadata varchar(30000),
     name varchar(255) not null,
     category_id int8 not null,
+    creator varchar(255),
+    editor varchar(255),
+    advertised bool not null default true,
     primary key (id),
     unique (name)
 );