Please cherry-pick:

Please cherry-pick:
- removed many PostConstruct methods as this was a bad idea anyway as it
  confuses the container while it is wrapping the managed beans into proxy
  objects. @EJB(lookup="full-JNDI-name") does fully replace this many code
- still I kept some there and may have to re-rename the now private method
- removed some JSF-only and some obsolete methods from interface and/or bean
- added GNU header to beans.xml

Signed-off-by: Roland Häder <roland@mxchange.org>