Add ScenarioChecker for processors with MeasurementAreas
The ProcessorFlag interface is a marker interface used anywehre a specifc attribute of some DataProcessors are needed. For instnace the UsesMeasurementArea Interface is implemented by all Processors usinge one or more MeasurementAreas. In this example the interface exposes an array of given MeasurementAreaIds which can be used within the ScenarioChecker. These interfaces are therefore aribtraty flags used to filter a generic list of DataProcesors if needed.