Updated conditional on job bean to support kabob case.

Also added comments  reader and writer properties so that boot's metadata resolver can utilize them.

resolves #794

Updated based on code review.

Updated java docs based on review

spring-cloud-task-samples/tasksink/src/test/java/io/spring/TaskSinkApplicationTests.java

@@ -78,7 +78,7 @@ public class TaskSinkApplicationTests {
 		assertThat(actualRequest.getDefinition().getProperties()
 			.get("server.port")).isEqualTo("0");
 		assertThat(actualRequest.getResource().toString()
-			.contains("maven://org.springframework.cloud.task.app:timestamp-task:jar:1.0.1.RELEASE"))
+			.contains("org.springframework.cloud.task.app:timestamp-task:jar:1.0.1.RELEASE"))
 			.isTrue();
 	}
 }