publish-toolstate: show more context on HTTP error

src/tools/publish_toolstate.py

@@ -275,7 +275,7 @@ def update_latest(
         return message
 
 
-if __name__ == '__main__':
+def main():
     repo = os.environ.get('TOOLSTATE_VALIDATE_MAINTAINERS_REPO')
     if repo:
         github_token = os.environ.get('TOOLSTATE_REPO_ACCESS_TOKEN')
@@ -342,3 +342,11 @@ if __name__ == '__main__':
         }
     ))
     response.read()
+
+
+if __name__ == '__main__':
+    try:
+        main()
+    except urllib2.HTTPError as e:
+        print("HTTPError: %s\n%s" % (e, e.read()))
+        raise