fix field success.

src/models/task.go

@@ -25,7 +25,7 @@ func SetEtcdURL(url string) {
 }
 
 const (
-	TASK_SUCESS  = "sucess"
+	TASK_SUCESS  = "success"
 	TASK_FAIL    = "fail"
 	TASK_PROCESS = "process"
 )