Hash concurrent foreign key names similar to Rails
This changes add_concurrent_foreign_key so that it hashes foreign key names instead of concatenating the table/column names together. See the commit message for more details.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This changes add_concurrent_foreign_key so that it hashes foreign key names instead of concatenating the table/column names together. See the commit message for more details.