Logged in user, subscribing to new service is not being redirected back to my-services

[kmidkiff]

In my test, the template was a $0.00 subscription

[kmidkiff]

Found Stripe error causing this. "You cannot combine currencies on a single customer. This customer has had a subscription, coupon, or invoice item with currency gbp" Was testing currencies when this occurred. We could ensure this wouldn't happen by having a user setting for currency as well.