NoopTask: Fix things that should be static. Add simple factory method.

indexing-service/src/main/java/io/druid/indexing/common/task/NoopTask.java

@@ -35,9 +35,9 @@ import org.joda.time.DateTime;
 public class NoopTask extends AbstractTask
 {
   private static final Logger log = new Logger(NoopTask.class);
-  private static int defaultRunTime = 2500;
-  private static int defaultIsReadyTime = 0;
-  private static IsReadyResult defaultIsReadyResult = IsReadyResult.YES;
+  private static final int defaultRunTime = 2500;
+  private static final int defaultIsReadyTime = 0;
+  private static final IsReadyResult defaultIsReadyResult = IsReadyResult.YES;
 
   enum IsReadyResult
   {
@@ -139,4 +139,9 @@ public class NoopTask extends AbstractTask
     log.info("Woke up!");
     return TaskStatus.success(getId());
   }
+
+  public static NoopTask create()
+  {
+    return new NoopTask(null, 0, 0, null, null);
+  }
 }