We must always use 127.0.0.1 for testing and optionally support
customizing it for different scenarios.
Also few minor fixes to testsuite/ui/satellite.
Change-Id: I46ef151c6aa92768cb24fc2b8c768f10d5dea75d
Users signing up through a url containing a promo code will have that code applied to their stripe account instead of the free tier coupon.
Change-Id: I071041b0934648ef3f5bdb05b6ec97c400f89ae4
Add some testing around adding/replacing promotional coupons and what
the user sees in the UI depending on their coupon status.
Change-Id: Ice6c0a0644d05af0c30c87a93ba963c0bb09e32d