At the moment only Readability & wallabag v2 import allow created_at import.
Pocket removed `time_added` field from their API v2 to v3...
And wallabag v1 doesn't export that value.
Instead of using a HTTP request we just login user like FOSUser does.
It allows us to mock service in container for functional tests.
Also, fix a bad config name in fos_user for firewall
And finally, add functional test to PocketImport
