[MEJB-93] Prevent re-adding of main artifact twice

 o Main artifact will be checked if it exists already. This
   will prevent replacing main artifact by a second execution
   of the plugin. Added an appropriate integration test.


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1722108 13f79535-47bb-0310-9956-ffa450edef68
6 files changed
tree: 47fd2d1fc63d30eed939807fbd3f9232fec43611
  1. src/
  2. pom.xml