Always store users

In case of write failure user profile may become inconsistent,
and there's no way to re-write it by all keys. Remove store optimization
and always store users from default_data by all possible keys.

Change-Id: I23e0c1107b87485d1c86e2e2133ceb77ee954b4e

stackalytics/processor/normalizer.py

@@ -46,6 +46,7 @@ def _normalize_user(user):
         emails=user.get('emails'),
         gerrit_id=user.get('gerrit_id'),
         github_id=user.get('github_id'),
+        zanata_id=user.get('zanata_id'),
         ldap_id=user.get('ldap_id')) or user.get('user_id')