Bump gds-api-adapters for new PP data-in endpoints
Don't raise error when PP returns 404 on upload

This means that when PP returns 404, the data for that service
and that day won't be pushed into the PP (because retries won't occur).

The PP team will monitor for 404s and create buckets on their
end; the working assumption is that we don't need to capture that data
until the PP is set up to receive it, and it's stored in the contacts
DB anyway, so can be resent manually if this is really needed.
Include the slug in service feedback aggregate

This will give the performance platform flexibility in how to
handle the service feedback (whether there is one dataset per slug,
or all slugs are within on dataset)
Merge pull request #135 from alphagov/service-feedback-pp-upload-improvements

Changes to service feedback push method to performance platform
 - Now uses data_group/data_type endpoints
 - No longer raises an exception when failing to upload, but instead increments a statsd counter with that slug