missing copyright headers

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1509373 13f79535-47bb-0310-9956-ffa450edef68
rejects committed by mistake... git -A

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1509374 13f79535-47bb-0310-9956-ffa450edef68