Revert "Dont set payment to processing as it breaks payment from being processed correctly leaving it in a processing state."

This reverts commit b32711a0279889d9fcd73a9b6fd4fc75ca0ee882.

We need this hack, for now, to avoid spree doing two authorizations
process for the same payment (one is done when creating the profile and
the other is done when moving order to complete via
Order#process_payments!
Point to another adyen gem fork branch

we will need new features to grab card last 4 digits on authorisation
Fetch cc last digits on authorise response

We can ask adyen support to enable this feature so we can get the last
digits on cc client encrypted api calls
Only set source last digits when they're blank
switch to rspec 3 mock syntax
put together a green build again
recurring payments working
turn off 3d secure
remove recurring
new hpp flow
add return url in staging and production
3D secure in the new flow
Recurring Payments with new flow
Create profile on card