Do not fail the review for apps using the account-application hook
Currently review throws the following error when using the account-application
hook:
- online_accounts:account-application_hook:calendar
'account-application' is disallowed in ubuntu-sdk-20.04: use 'accounts' hook instead
However, the hook is still present and working in lss-online-accounts.
@mardy suggested turning this into a warning:
So, if you are writing a client application, the recommended API is that from the online-accounts-api project, and that uses the accounts hook. I'm not sure that we want to disallow the account-application one, though; maybe the review tool should just emit a warning instead.