Bump junit in /tensorflow/java/maven/tensorflow-hadoop

Bumps [junit](https://github.com/junit-team/junit4) from 4.11 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.11.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.11...r4.13.1)
Signed-off-by: Ndependabot[bot] <support@github.com>

tensorflow/java/maven/tensorflow-hadoop/pom.xml

@@ -16,7 +16,7 @@
         <maven.compiler.target>1.6</maven.compiler.target>
         <hadoop.version>2.6.0</hadoop.version>
         <protobuf.version>3.5.1</protobuf.version>
-        <junit.version>4.11</junit.version>
+        <junit.version>4.13.1</junit.version>
     </properties>
 
     <licenses>