We will be working with multiple model DBs in 1 IAM.
In this case, our IAM has 1 Model and several Model DBs which are linked to this model (e.g. DB_1 and DB_2)
To upgrade these databases we now need to run 2x twdeployer; 1x for DB_1 and 1x for DB_2.
It would be much nicer if twdeployer had the option to upgrade all model DB's at once based on the contents of the gui_appl.
