Adding database schema for testing jdbc source

db-scripts/sample-schema.sql

@@ -0,0 +1,9 @@
+DROP TABLE IF EXISTS test;
+create table test(
+  id bigint,
+  name varchar (2000),
+  tag char(1)
+);
+insert into test values (1, 'Bob', NULL);
+insert into test values (2, 'Jane', NULL);
+insert into test values (3, 'John', NULL);