Fix test names in test_trainprep.

tests/icosagon/test_trainprep.py

@@ -204,7 +204,7 @@ def test_prep_rel_two_node_types_asym_01():
     assert len(prep_rel.edges_back_neg.test) == 1
 
 
-def test_prepare_relation_type_01():
+def test_prepare_relation_type_02():
     with pytest.raises(ValueError):
         prepare_relation_type(None, None, True)
 
@@ -220,7 +220,7 @@ def test_prepare_relation_type_01():
     _ = prepare_relation_type(rel, ratios, True)
 
 
-def test_prepare_relation_type_02(monkeypatch):
+def test_prepare_relation_type_03(monkeypatch):
     a = 0
     b = 0
     c = 0