Setting the client-side payment processor for ecommerce

This will help get developers up and running with payments.

LEARNER-1375

provision-ecommerce.sh

@@ -4,5 +4,5 @@
 ./provision-ida.sh ecommerce 18130
 
 # Configure ecommerce
-docker exec -t edx.devstack.ecommerce bash -c 'source /edx/app/ecommerce/ecommerce_env && python /edx/app/ecommerce/ecommerce/manage.py create_or_update_site --site-id=1 --site-domain=localhost:18130 --partner-code=edX --partner-name="Open edX" --lms-url-root=http://edx.devstack.lms:18000 --payment-processors=cybersource,paypal --client-id=ecommerce-key --client-secret=ecommerce-secret --from-email staff@example.com'
+docker exec -t edx.devstack.ecommerce bash -c 'source /edx/app/ecommerce/ecommerce_env && python /edx/app/ecommerce/ecommerce/manage.py create_or_update_site --site-id=1 --site-domain=localhost:18130 --partner-code=edX --partner-name="Open edX" --lms-url-root=http://edx.devstack.lms:18000 --client-side-payment-processor=cybersource --payment-processors=cybersource,paypal --client-id=ecommerce-key --client-secret=ecommerce-secret --from-email staff@example.com'
 docker exec -t edx.devstack.ecommerce bash -c 'source /edx/app/ecommerce/ecommerce_env && python /edx/app/ecommerce/ecommerce/manage.py oscar_populate_countries --initial-only'