Fix StopIteration error on Ubuntu Focal

As per victoria cycle testing runtime and community goal,
we need to migrate upstream CI/CD to Ubuntu Focal(20.04).

StopIteration error happening in pep8 job when running on Focal.

we can see the failure in https://review.opendev.org/#/c/744331/

Change-Id: Iecdd3bfddb95adec77f8581f844cfc74ca59fc73
Story: #2007865
Task: #402207

osprofiler/hacking/checks.py

@@ -73,7 +73,10 @@ def skip_ignored_lines(func):
         line = logical_line.strip()
         if not line or line.startswith("#") or line.endswith("# noqa"):
             return
-        yield next(func(logical_line, filename))
+        try:
+            yield next(func(logical_line, filename))
+        except StopIteration:
+            return
 
     return wrapper