Skip hard to converge test.

feflow/tests/test_relative.py

@@ -292,7 +292,7 @@ def test_hostguest_overlap():
             raise Exception(message)
 
 # TODO: This is skipped on perses, probably needs more iterations to converge? Skipping for now.
-# @pytest.mark.skip(reason="Expensive. Hard to converge.")
+@pytest.mark.skip(reason="Expensive. Hard to converge.")
 def test_difficult_overlap(n_iterations=500):
     """Test that the variance of the endpoint->nonalchemical perturbation is sufficiently small for imatinib->nilotinib in solvent"""
     name1 = 'imatinib'