Remove constraint used only to test.

This constraint is not generic enough to be kept
Add test to check a full upgrade
Simplify erp5_upgrader to be possible upgrade any project just enabling the alarms that all Constraints will be called and fixed.

The alarms were renamed to cover each step of upgrader and give the possibility to call each step manually one-by-one. Also, all Scripts that the logic can be done by installing Business Template was removed.
Update change log
Add constraints to be used in tests as example
Improve code to create Active Process in the alarm
Fix indexes to be possible see the steps order easily