I want to integrate Openfire into GenieACS version 1.2.9 directly. Is this possible?
Sure,
pull code from GIT and jump at it. 
Although, probably better if you pull the latest code, as 1.2.9 is a bit old, like 3 years…
Then, bugg zaidka when stuck, hopefully he responds.
[ADMIN EDIT] Absolutely not. Do not needlessly tag people, your account will be suspended. [/ADMIN EDIT]
Regards,
Robert.