title: Tomcat configure external properties and log files
body: <p>I have a webapp deployed in a Tomcat7 in <em>webapps/webapp</em>. Inside this webapp there a <em>logback.xml</em> and <em>persistence.property</em> files. </p>
  
  <p>When I start the server this files are taken into consideration. I'd like tomcat to load this files from an external directory. e.g. <em>/home/tomcat/conf</em></p>
  
  <p>How do I do that?</p>