MAPREDUCE-7342. Stop RMService in TestClientRedirect.testRedirect() (#2968)

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestClientRedirect.java

@@ -279,6 +279,14 @@ public class TestClientRedirect {
       super(name);
     }
 
+    @Override
+    protected void serviceStop() throws Exception {
+      if (server != null) {
+        server.stop();
+      }
+      super.serviceStop();
+    }
+
     @Override
     protected void serviceInit(Configuration conf) throws Exception {
       clientServiceBindAddress = RMADDRESS;