[OMCProcessDocker*] rework inheritance chain; no multiple inheritance!

Author: syntron

OMPython/OMCSession.py

@@ -599,7 +599,7 @@ def _omc_port_get(self) -> str:
         return port
 
 
-class OMCProcessDockerHelper:
+class OMCProcessDockerHelper(OMCProcess):
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
@@ -662,7 +662,7 @@ def get_docker_container_id(self) -> str:
         return self._dockerCid
 
 
-class OMCProcessDocker(OMCProcessDockerHelper, OMCProcess):
+class OMCProcessDocker(OMCProcessDockerHelper):
 
     def __init__(
             self,
@@ -843,7 +843,7 @@ def _omc_docker_start(self) -> Tuple[subprocess.Popen, DummyPopen, str]:
         return omc_process, docker_process, docker_cid
 
 
-class OMCProcessDockerContainer(OMCProcessDockerHelper, OMCProcess):
+class OMCProcessDockerContainer(OMCProcessDockerHelper):
 
     def __init__(
             self,