DATAJDBC-547 - Polishing.

Add scripts for DB2 after rebase.

Original pull request: #221.

spring-data-jdbc/src/test/resources/org.springframework.data.jdbc.core/JdbcAggregateTemplateSchemaIntegrationTests-db2.sql

@@ -0,0 +1,17 @@
+DROP TABLE OTHER.DUMMY_ENTITY;
+DROP TABLE OTHER.REFERENCED;
+DROP SCHEMA OTHER RESTRICT;
+
+CREATE SCHEMA OTHER;
+
+CREATE TABLE OTHER.DUMMY_ENTITY
+(
+  ID BIGINT GENERATED BY DEFAULT AS IDENTITY (START WITH 1) PRIMARY KEY,
+  NAME VARCHAR(30)
+);
+
+CREATE TABLE OTHER.REFERENCED
+(
+  DUMMY_ENTITY INTEGER,
+  NAME VARCHAR(30)
+);