Rename file for dropping old tables so that we can do remove them once we have update...

diff --git a/upgrade/1.1.0/03_new_mail_delete_old.sql b/upgrade/1.1.0/new_mail_delete_old.sql.noauto
similarity index 100%
rename from upgrade/1.1.0/03_new_mail_delete_old.sql
rename to upgrade/1.1.0/new_mail_delete_old.sql.noauto