[maven-release-plugin] copy for tag apache-15

git-svn-id: https://svn.apache.org/repos/asf/maven/pom/tags/apache-15@1626896 13f79535-47bb-0310-9956-ffa450edef68
tree: cca82f97be447414754d0b5517da06e6541f0475
  1. pom.xml
  2. site-pom.xml
  3. src/