Merge pull request #386 from magento-mpi/MAGETWO-58282

Fixed issues:
 - MAGETWO-56347 [Github] #5788 REST API PayPal does not call setExpressCheckout method
 - MAGETWO-57744 Configure button for Paypal solutions is shifted after changing window width
 - MAGETWO-57855 Outdated PayPal URL
 - MAGETWO-58162 PayPal Payflow Pro always using USD (even if this currency is absent on your store)
 - MAGETWO-58255 Unable to view signed up billing agreement on storefront
 - MAGETWO-58282 [PR] Bugfixes delivery for 2.2
 - MAGETWO-56934 Checkout page freezes when ordering with Authorize.net with invalid credit card
 - MAGETWO-57893 Orders processed via Paypal Payflow Pro not receiving shipping/tax charges