Fix "Add '--single-transaction' flag to db restore"
Fix "Add '--single-transaction' flag to db restore"

Last change for the `import-and-clean-db-dump` script had the order of arguments slightly wrong, so the script failed with

```
psql: invalid connection option "bcrypt_password"
```

This commit should fix it 🤞
alphagov/digitalmarketplace-aws,alphagov/digitalmarketplace-aws,alphagov/digitalmarketplace-aws