feat: randomize creator of generated issues.

All the issues used to be created by admin. This randomly chooses
a user (except anonymous) to create an issue.

Author: rouilj

tools/load_tracker.py

@@ -80,6 +80,7 @@
             status = random.choice(statuses)
         else:
             status = resolved_id
+        db.journaltag = db.user.get(random.choice(users), 'username')
         db.issue.create(
             title=random.choice(titles),
             priority=random.choice(priorities),