[MASSEMBLY-576] Manifest classpath not added for maven 3.x

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1632173 13f79535-47bb-0310-9956-ffa450edef68
Updated p-archiver 2.7 and p-io 2.2

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1632174 13f79535-47bb-0310-9956-ffa450edef68