gnu.lister: Use url as primary key

Otherwise, we are failing unicity constraint.

Related to T2070

swh/lister/gnu/lister.py

@@ -97,7 +97,7 @@ class GNULister(SimpleLister):
 
         """
         return {
-            'uid': repo['name'],
+            'uid': repo['url'],
             'name': repo['name'],
             'full_name': repo['name'],
             'html_url': repo['url'],

[Phabricator Migration user]

Some references in the commit message have been migrated:

• T2070 is now #2070 (closed)