ACCUMULO-970 add license header for recently created files

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1464672 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-970 add license header for recently created files

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1464673 13f79535-47bb-0310-9956-ffa450edef68