fix blanks.

Author: hfutatzhanghb

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/fairness/RouterAsyncRpcFairnessPolicyController.java

@@ -41,7 +41,7 @@ public class RouterAsyncRpcFairnessPolicyController extends
       LoggerFactory.getLogger(RouterAsyncRpcFairnessPolicyController.class);
 
   public static final String INIT_MSG = "Max async call permits per nameservice: %d";
-  
+
   public RouterAsyncRpcFairnessPolicyController(Configuration conf) {
     init(conf);
   }

hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/fairness/TestRouterAsyncRpcFairnessPolicyController.java

@@ -46,7 +46,7 @@ public class TestRouterAsyncRpcFairnessPolicyController {
   private static String nameServices =
       "ns1.nn1, ns1.nn2, ns2.nn1, ns2.nn2";
   private static int perNsPermits = 30;
-  
+
   @Test
   public void testHandlerAllocationEqualAssignment() {
     RouterRpcFairnessPolicyController routerRpcFairnessPolicyController