* Sonar qube 6 (#174)
* test class ModbusConn
* Sonar qube 3 (#178)
* add more unit tests
* GEN3: don't crash on overwritten msg in the receive buffer
* improve test coverage und reduce test delays
* reduce cognitive complexity
* use random IP adresses for unit tests
* Docker: The description ist missing (#171)
Fixes#167
* S allius/issue167 (#172)
* cleanup
* Sonar qube 6 (#174)
* test class ModbusConn