ITF should be able to connect to 2 qemu instances at the same time

There is needed for 2 qemu images in parallel and ITF doesnt support this feature
The version of ITF where this missing feature has been checked is main branch e994cb6
At the moment own implem had to be added to complement ITF 
https://github.com/eclipse-score/inc_someip_gateway/pull/19/changes#diff-a2e724324e27aeed0431ee547c966d2a850fac682faa7ecc4dab111242ac88f1
