HDFS-17432. Fix junit dependency to enable JUnit4 tests to run in hadoop-hdfs-rbf (#6639)

Reviewed-by: Dinesh Chitlangia <dineshc@apache.org>

hadoop-hdfs-project/hadoop-hdfs-rbf/pom.xml

@@ -182,6 +182,11 @@ https://maven.apache.org/xsd/maven-4.0.0.xsd">
       <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.junit.vintage</groupId>
+      <artifactId>junit-vintage-engine</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>