Add xml test for all models

Author: ratheron

tests/integration/test_models.py

@@ -0,0 +1,14 @@
+import pytest
+
+from drone_models.drones import available_drones
+
+from crazyflow.sim import Sim
+from crazyflow.sim.physics import Physics
+
+
+@pytest.mark.integration
+@pytest.mark.parametrize("physics", Physics)
+@pytest.mark.parametrize("model", available_drones)
+def test_attitude_symbolic(physics: Physics, model: "str"):
+    """Tests if xml files contain syntax errors."""
+    Sim(physics=physics, drone_model=model)