HADOOP-17602. Upgrade JUnit to 4.13.1. Contributed by Ahmed Hussein.

hadoop-project/pom.xml

@@ -824,7 +824,7 @@
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>4.11</version>
+        <version>4.13.1</version>
       </dependency>
       <dependency>
         <groupId>commons-lang</groupId>