PLF-5900 : Use EXOGTN for eXo Platform Community
PLF-5684 : Declare the source release package used to bundle all PLF sources
Use maven-parent-pom 13

Conflicts:
	pom.xml
Merge branch 'feature/stabilization'
Merge branch 'master' into feature/stabilization
Merge commit 'ff6482d9d456a21715df30dcfbfb16cad8b2b4fd' into HEAD