DATAJDBC-637 - Fix typo in H2 testing.

Original pull request: #254.

spring-data-jdbc/src/test/resources/org.springframework.data.jdbc.core/JdbcAggregateTemplateIntegrationTests-h2.sql

@@ -307,6 +307,6 @@ CREATE TABLE WITH_READ_ONLY
 
 CREATE TABLE WITH_LOCAL_DATE_TIME
 (
-    ID        PRIMARY KEY,
+    ID        SERIAL PRIMARY KEY,
     TEST_TIME TIMESTAMP(9) WITHOUT TIME ZONE
 );