Tidy get calls to make testing easier

Chaining the `get` calls would mean a messy amount of Mocks. Just use a
single `get` call and if it's empty return a dummy struct for sanity's
sake.

Also `get('name')` on the returned struct since we run into issues with
Mocking without it.

Fixes iamjackg#117

md2cf/upsert.py

@@ -126,10 +126,9 @@ def labels_need_updating(page, existing_page):
 
     if sorted(
         [
-            label.name
-            for label in existing_page.get("metadata", {})
-            .get("labels", {})
-            .get("results", {})
+            # Use `get()` here for unit test sanity -- `Mock().name` is reserved.
+            label.get("name")
+            for label in existing_page.get("metadata", {"labels": {"results": {}}})
         ]
     ) != sorted(page.labels):
         return True