Resolve #26 - Make sure we clear processor specific metadata from payment form when changing processor

Drop use of civicrm_stripe_plans table and just query Stripe each time. This prevents errors when they get out of sync

Jamie McClelland authored 6 years ago and mattwire committed 6 years ago

Otherwise we may ignore a credit card provided by a user
and instead charge the one associated with their account.

https://lab.civicrm.org/extensions/stripe/issues/4

Use contact_id as reference in civicrm_stripe_customers and don't require an email address for payment