Prefer property name instead of title for class name

Not doing so breaks reference resolution in case the title doesn't match
the property name.

Author: jrversteegh

openapi_python_client/parser/properties/__init__.py

@@ -251,7 +251,7 @@ def build_model_property(
     optional_properties: List[Property] = []
     relative_imports: Set[str] = set()
 
-    class_name = data.title or name
+    class_name = name or data.title
     if parent_name:
         class_name = f"{utils.pascal_case(parent_name)}{utils.pascal_case(class_name)}"
     ref = Reference.from_ref(class_name)

tests/test_parser/test_properties/test_init.py

@@ -1083,14 +1083,14 @@ def test_build_model_property(additional_properties_schema, expected_additional_
     assert new_schemas != schemas
     assert new_schemas.models == {
         "OtherModel": None,
-        "ParentMyModel": model,
+        "ParentProp": model,
     }
     assert model == ModelProperty(
         name="prop",
         required=True,
         nullable=False,
         default=None,
-        reference=Reference(class_name="ParentMyModel", module_name="parent_my_model"),
+        reference=Reference(class_name="ParentProp", module_name="parent_prop"),
         required_properties=[StringProperty(name="req", required=True, nullable=False, default=None)],
         optional_properties=[DateTimeProperty(name="opt", required=False, nullable=False, default=None)],
         description=data.description,