title: Provide additional classpath on jar having embedded Tomcat
body: <p>I have a executable jar containing an embedded Tomcat which is created thanks to tomcat7-maven-plugin: tomcat7:exec-war.</p>
  
  <p>I need to provide an additional classpath for some Jar because I cannot include them directly in my executable Jar. How can I provide this classpath ?</p>
  
  <ul>
  <li>I cannot execute <code>export CLASSPATH</code> before I launch my executable Jar because <code>catalina.sh/.bat</code> erase the <code>CLASSPATH</code> value.</li>
  <li>I cannot provide a <code>setenv.sh/.bat</code> because the executable Jar is created by the maven plugin.</li>
  <li>I cannot update property <code>common.loader</code> from <code>catalina.properties</code> because I don't have control on this file which is generated by maven plugin.</li>
  </ul>
  
  <p>Note: I don't want to specify a hardcoded path to the lib in the executable Jar.</p>