[ModelicaSystemDoE] add argument value for isParameterChangeable()

* will be modified / removed in another commit series

Author: syntron

OMPython/ModelicaSystem.py

@@ -1500,7 +1500,7 @@ def prepare(self) -> int:
         param_structure = {}
         param_simple = {}
         for param_name in self._parameters.keys():
-            changeable = self._mod.isParameterChangeable(name=param_name)
+            changeable = self._mod.isParameterChangeable(name=param_name, value=None)
             logger.info(f"Parameter {repr(param_name)} is changeable? {changeable}")
 
             if changeable: