Set 1.2.4 version number
Creacte 1.2.4 release branch
Set 1.2.3 version number
Create release branch.
Set 1.2.2 version number.
Tag version 1.2.2
Merge fix from the trunk.
set 1.2.1 version number.
Create 1.2.1 release branch.
Set 1.2.0 version number.