Merge branch 'master' into feature/stabilization
ECMS-6296: Update ECMS unit tests to adapt change from JCR-2307
ECMS-5998: Can't import intranet folder after deleting node "exo:actions"

Fix description:
- Update the node type definition of exo:actionable. Property exo:actions is not mandatory any more.
- Add new upgrade plugin ActionableNodeTypeUpgradePlugin to update legacy data.
Merge branch 'feature/stabilization'
SWF-2923 : Create pkg-improv branch and update projects versions

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