[OMCSessionException] add exception handling for OMCSession*

Author: syntron

OMPython/OMCSession.py

@@ -75,6 +75,10 @@ def wait(self, timeout):
         return self.process.wait(timeout=timeout)
 
 
+class OMCSessionException(Exception):
+    pass
+
+
 class OMCSessionBase(metaclass=abc.ABCMeta):
 
     def __init__(self, readonly=False):

OMPython/__init__.py

@@ -38,7 +38,7 @@
 
 import logging
 
-from OMPython.OMCSession import OMCSessionBase, OMCSessionZMQ
+from OMPython.OMCSession import OMCSessionBase, OMCSessionZMQ, OMCSessionException
 from OMPython.ModelicaSystem import ModelicaSystem, ModelicaSystemError, LinearizationResult
 
 # Logger Defined
@@ -63,6 +63,7 @@
     'ModelicaSystemError',
     'LinearizationResult',
 
+    'OMCSessionException',
     'OMCSessionZMQ',
     'OMCSessionBase',
 ]