title: error upgrading aspectj-maven-plugin v1.8
body: <p>Upgrading the maven plugin from 1.7 to 1.8 results in the following error message: </p>
  
  <p>[ERROR] 'dependencies.dependency.systemPath' for com.sun:tools:jar must specify an absolute path but is ${toolsjarSystemPath} @ 
      pom.xml /ash-domain line 1  </p>