FIX: revert usage of main lib has_parent

unittests/test_yaml_model_parser.py

@@ -32,6 +32,14 @@ def has_property(el, name):
     return False
 
 
+def has_parent(el, name):
+    for p in el.get_parents():
+        if p.name == name:
+            return True
+
+    return False
+
+
 class TwiceTest(unittest.TestCase):
     def test_defined_once(self):
         string = """
@@ -140,16 +148,16 @@ RT4:
 RT5:
 """
         model = parse_model_from_yaml(to_file(string))
-        assert model["RT1"].has_parent("RT2", retrieve=False)
+        assert has_parent(model["RT1"], "RT2")
         assert (model["RT1"].get_parent(
             "RT2")._flags["inheritance"] == db.SUGGESTED)
-        assert model["RT1"].has_parent("RT3", retrieve=False)
+        assert has_parent(model["RT1"], "RT3")
         assert (model["RT1"].get_parent(
             "RT3")._flags["inheritance"] == db.RECOMMENDED)
-        assert model["RT1"].has_parent("RT4", retrieve=False)
+        assert has_parent(model["RT1"], "RT4")
         assert (model["RT1"].get_parent(
             "RT4")._flags["inheritance"] == db.OBLIGATORY)
-        assert model["RT1"].has_parent("RT5", retrieve=False)
+        assert has_parent(model["RT1"], "RT5")
         assert (model["RT1"].get_parent(
             "RT5")._flags["inheritance"] == db.OBLIGATORY)
 
@@ -501,5 +509,5 @@ R3:
     assert isinstance(r3, db.RecordType)
     for par in ["R1", "R2"]:
         # Until removal, both do the same
-        assert r3.has_parent(par, retrieve=False)
+        assert has_parent(r3, par)
         assert r3.get_parent(par)._flags["inheritance"] == db.OBLIGATORY