[OMCSession] move call to set_timeout() to __post_init__

Author: syntron

OMPython/OMCSession.py

@@ -642,9 +642,7 @@ def __init__(
         """
 
         # store variables
-        # set_timeout() is used to define the value of _timeout as it includes additional checks
-        self._timeout: float
-        self.set_timeout(timeout=timeout)
+        self._timeout = timeout
         # generate a random string for this instance of OMC
         self._random_string = uuid.uuid4().hex
         # get a temporary directory