added errorFlags map to dummy interface

tests/include/TecDummy.h

@@ -40,6 +40,10 @@ struct TecDummy : ChimeraTK::DummyBackend {
   // time again.
   size_t loopDoneDelay{0};
 
+  // Map containin error flags which will be sent back as a reply during the next communication for the given parameter.
+  // A value of zero or the absense of a value results in no error being generated.
+  std::map<TecFrame::TecParameter, uint8_t> errorFlags;
+
  protected:
   // hardcoded addresses used by the dummy, need to match addresses of map file
   constexpr static uint8_t TecDummy_bar{0};