[CI] Update Postgres to use latest of 11 not 11.1 (#5628)

Author: Corneil du Plessis

spring-cloud-dataflow-server-core/src/test/java/org/springframework/cloud/dataflow/server/batch/JdbcAggregateJobQueryPostgresDaoTests.java

@@ -24,15 +24,15 @@
 
 import org.springframework.cloud.dataflow.core.database.support.DatabaseType;
 
-
 @Testcontainers
-public class JdbcAggregateJobQueryPostgresDaoTests extends AbstractJdbcAggregateJobQueryDaoTests{
+public class JdbcAggregateJobQueryPostgresDaoTests extends AbstractJdbcAggregateJobQueryDaoTests {
 
 	@Container
-	private static final JdbcDatabaseContainer dbContainer = new PostgreSQLContainer("postgres:11.1");
+	private static final JdbcDatabaseContainer dbContainer = new PostgreSQLContainer("postgres:11");
 
 	@BeforeEach
 	void prepareForTest() throws Exception {
 		super.prepareForTest(dbContainer, "postgresql", DatabaseType.POSTGRES);
 	}
+
 }

spring-cloud-dataflow-server-core/src/test/java/org/springframework/cloud/dataflow/server/batch/JdbcJobSearchableInstancePostgresDaoTests.java

@@ -26,10 +26,11 @@
 class JdbcJobSearchableInstancePostgresDaoTests extends AbstractJdbcJobSearchableInstanceDaoTests {
 
 	@Container
-	private static final JdbcDatabaseContainer<?> mariaDBContainer = new PostgreSQLContainer<>("postgres:11.1");
+	private static final JdbcDatabaseContainer<?> mariaDBContainer = new PostgreSQLContainer<>("postgres:11");
 
 	@BeforeEach
 	void prepareForTest() throws Exception {
 		super.prepareForTest(mariaDBContainer, "postgresql");
 	}
+
 }

spring-cloud-dataflow-server-core/src/test/java/org/springframework/cloud/dataflow/server/batch/SimpleJobServicePostgresTests.java

@@ -39,7 +39,7 @@
 public class SimpleJobServicePostgresTests extends AbstractSimpleJobServiceTests {
 
 	@Container
-	private static final PostgreSQLContainer<?> postgreSQLContainer = new PostgreSQLContainer<>("postgres:11.1");
+	private static final PostgreSQLContainer<?> postgreSQLContainer = new PostgreSQLContainer<>("postgres:11");
 
 	@BeforeEach
 	void setup() throws Exception {