Explain SPA codes in error legend (bug 1036461)
Merge pull request #514 from kumar303/spa-error-codes

Explain SPA codes in error legend (bug 1036461)
Merge branch 'master' of github.com:mozilla/webpay
Revert "Revert "Store Persona Email in Solitude (bug 1027275)""

This reverts commit 664af14cb3aa71e776ac167c307082b4d1b5d0b9.
Set buyer on transaction for Boku (bug #1034305)

- Update api client to send buyer to solitude
- Update tests