Merge branch 'master' into feature/stabilization
PLF-5974: Cannot start PLF with MySQL in UTF-8 (calendar)

Fix description:
- Add dialect to repository configuration
CAL-966 Can't create or update event categories
de injection on 20140722-004943
CAL-936 Calendar unified search got ineffectively memory usage cause OOME
CAL-936 Improve unified query of calendar connector
CAL-936 minor fix on search query
Merge branch 'feature/stabilization'
SWF-2923 : Create pkg-improv branch and update projects versions

Signed-off-by: Arnaud Héritier <aheritier@exoplatform.com>