The test-all script now calls the symlink, and the run script
has been cleaned up to be symlink friendly.
(imported from commit 8abb5c1e5744416e94ff843e50c53e0d0f7e1316)
This needs to be deployed to both staging and prod at the same
off-peak time (and the schema migration run).
At the time it is deployed, we need to make a few changes directly in
the database:
(1) UPDATE django_content_type set app_label='zerver' where app_label='zephyr';
(2) UPDATE south_migrationhistory set app_name='zerver' where app_name='zephyr';
(imported from commit eb3fd719571740189514ef0b884738cb30df1320)