API BEHAVIOUR CHANGE (v1.4.7): this commit adds an additional check
before running multi-ROC parallel tests: the pixelConfigs on all
enabled ROCs should be the same.
In case you want to just test two or three ROCs make sure to use
_dut->setROCEnable(id,false) for the other ROCs, otherwise you
will be forced into FLAG_FORCE_SERIAL mode!