added license header

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1595625 13f79535-47bb-0310-9956-ffa450edef68
added license header

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1595626 13f79535-47bb-0310-9956-ffa450edef68