[test_ModelicaSystem] fix rebase fallout (2)

Author: syntron

tests/test_ModelicaSystem.py

@@ -161,10 +161,12 @@ def test_getSolutions_docker(model_firstorder_content):
 
     file_path = pathlib.Path(modelpath)
     mod = OMPython.ModelicaSystem(
-        file=file_path,
-        model="M",
         omc_process=omc.omc_process,
     )
+    mod.model(
+        name="M",
+        file=file_path,
+    )
 
     _run_getSolutions(mod)