separate from a successful or failed login.
1) Rename user_login_failed event to user_authenticate_failed
2) Rename failed_logins table to failed_auth (bump Gallery module to
v27 to rename the table)
3) auth::too_many_failed_logins -> auth::too_many_failures
4) auth::record_failed_auth_attempts -> auth::record_failed_attempts
auth::clear_failed_auth_attempts -> auth::clear_failed_attempts