[OMCProcess*] do not unlink temporary files

Author: syntron

OMPython/OMCSession.py

@@ -577,7 +577,7 @@ def _omc_port_get(self) -> str:
                 # Read the port file
                 with open(file=omc_file_port, mode='r', encoding="utf-8") as f_p:
                     port = f_p.readline()
-                omc_file_port.unlink()
+                break
 
             if port is not None:
                 break
@@ -802,10 +802,6 @@ def _omc_docker_start(self) -> Tuple[subprocess.Popen, DummyPopen]:
                 break
             time.sleep(self._timeout / 40.0)
 
-        # file no longer needed
-        self._dockerCidFile.unlink()
-        self._dockerCidFile = None
-
         if self._dockerCid is None:
             logger.error(f"Docker did not start. Log-file says:\n{self.get_log()}")
             raise OMCSessionException(f"Docker did not start (timeout={self._timeout} might be too short "