[Wikibase] Disable repo module for now.

https://gerrit.wikimedia.org/r/#/c/72528/7/repo/Wikibase.i18n.php,unified
introduced a huge change in the message keys to ignore.
I will update config file tomorrow but for today skipping
repo for export

Change-Id: Ibdb0c716cea2a5c9b9cfef6bcb77245e2fef45ca