Change version of pom.xml to 2.9.4-SNAPSHOT
Change version of pom.xml to 2.6.12-SNAPSHOT
Change version of pom.xml to 2.8.4-SNAPSHOT
Merge branch 'branches/rudder/2.6' into branches/rudder/2.8
Merge branch 'branches/rudder/2.8' into branches/rudder/2.9
Merge branch 'branches/rudder/2.9'
Fixes #4506: Add Group composition backend