#PayPal Client Side REST Checkout
broadleaf.paypalcheckout.rest.client-id=?
broadleaf.paypalcheckout.rest.secret=?
broadleaf.paypalcheckout.rest.mode=? (e.g. sandbox or live)
broadleaf.paypalcheckout.rest.return-url=? (e.g. https://test.blc.localhost:8443/paypal-checkout/return)
broadleaf.paypalcheckout.rest.cancel-url=? (e.g. https://test.blc.localhost:8443/paypal-checkout/cancel)
broadleaf.paypalcheckout.rest.description=? (e.g. My Test Store)