Support ability to run in development mode with postgresql for batch sample.

spring-cloud-task-samples/batch-job/pom.xml

@@ -57,6 +57,20 @@
 			<groupId>org.mariadb.jdbc</groupId>
 			<artifactId>mariadb-java-client</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>postgresql</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-testcontainers</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+		</dependency>
 	</dependencies>
 
 	<repositories>