Add maven rule for Junit

debian/maven.ignoreRules

 
-junit junit * * * *
 xerces xercesImpl * * * *
 org.apache.maven.plugins maven-source-plugin * * * *
 org.sonatype.plugins nexus-staging-maven-plugin * * * *

debian/maven.rules

 
 com.drewnoakes metadata-extractor jar s/.*/debian/ * *
+junit junit * s/4\..*/4.x/ * *