Filter out unsupported tests

ubermag/micromagnetictests#47 introduces additional tests for the
relax driver which is not supported in oommf.

oommfc/tests/conftest.py

@@ -2,7 +2,20 @@
 
 import oommfc as oc
 
+not_supported_by_oommf = ["test_check_for_energy_and_dynamics", "test_relaxdriver"]
+
 
 @pytest.fixture(scope="module")
 def calculator():
     return oc
+
+
+@pytest.fixture(autouse=True)
+def skip_unsupported_or_missing(request):
+    requesting_test_function = (
+        f"{request.cls.__name__}.{request.function.__name__}"
+        if request.cls
+        else request.function.__name__
+    )
+    if requesting_test_function in not_supported_by_oommf:
+        pytest.skip("Not supported by OOMMF.")