Prune unnecessary log4j dependencies in maven

If you want to use the newest log4j with maven build, you may notice a few dependencies you may not want to include if you just want to have plain ordinary logging without JMX or mail support.

<dependency>
 <groupId>log4j</groupId>
 <artifactId>log4j</artifactId>
 <version>1.2.15</version>
 <exclusions>
  <exclusion>
   <groupId>javax.jms</groupId>
   <artifactId>jms</artifactId>
  </exclusion>
  <exclusion>
   <groupId>javax.mail</groupId>
   <artifactId>mail</artifactId>
  </exclusion>    
  <exclusion>
   <groupId>com.sun.jdmk</groupId>
   <artifactId>jmxtools</artifactId>
  </exclusion>
  <exclusion>
   <groupId>com.sun.jmx</groupId>
   <artifactId>jmxri</artifactId>
  </exclusion>    
 </exclusions>
</dependency>