OGM-509 copyright headers

I've followed Hardy approached since the maven license plugin did not work out of the box.

* Test resources are not included in the check, let me know if this is ok.
* I've changed the copyrights to all the properties that already have one and I haven't added it to the one without.
* I didn't change the copyright to the jbossts-properties.xml files in core and document. Let me know if I have to