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
UI-3312: UI Bug in answer after change to  language
FORUM-606 | Fix problem of NullPointerException when start server
Merge feature/stabilization to master
Merge master to feature/stabilization
Merge commit '2bdbcdffc0057bd9eb3b3a5b3a855989488c9c67' into HEAD