Changes to support putting SCDF back onto snapshot

* Only configure the BatchListener if the Job.class has a bean instance
* Add the task-batch to the task-dependencies pom.

spring-cloud-task-dependencies/pom.xml

@@ -22,6 +22,11 @@
 				<artifactId>spring-cloud-task-core</artifactId>
 				<version>1.0.0.BUILD-SNAPSHOT</version>
 			</dependency>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-task-batch</artifactId>
+				<version>1.0.0.BUILD-SNAPSHOT</version>
+			</dependency>
 		</dependencies>
 	</dependencyManagement>