another fix - missing class rename (ModelExecutionCmd => ModelExecutionConfig)

Author: syntron

tests_v400/test_ModelicaSystemCmd.py

@@ -18,7 +18,7 @@ def model_firstorder(tmp_path):
 @pytest.fixture
 def mscmd_firstorder(model_firstorder):
     mod = OMPython.ModelicaSystem(fileName=model_firstorder.as_posix(), modelName="M")
-    mscmd = OMPython.ModelExecutionCmd(
+    mscmd = OMPython.ModelExecutionConfig(
         runpath=mod.getWorkDirectory(),
         model_name=mod._model_name,
         cmd_prefix=[],