Add a retained annotation to make sure package-info.class is created to avoid re-compiles

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1562237 13f79535-47bb-0310-9956-ffa450edef68
[CXF-5524] More addType fixes
Patch from Denis Simonov, although hard to apply and may have missed something

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1562238 13f79535-47bb-0310-9956-ffa450edef68