Remove notes from session (bug 899836)

This saves space in the cookie value.
Merge pull request #219 from kumar303/no-notes

Remove notes from session (bug 899836)
Activate Bango Test for bug 899836
Prevent dupe configuration, same sess (bug 893126)
Flipping back to fakepay for functional tests
Merge pull request #222 from kumar303/dupe-trans

Prevent dupe configuration, same sess (bug 893126)
Turn on Bango Test for bug 893126
Revert "Turn on Bango Test for bug 893126"

This reverts commit 975792a3afa9052877eddb1fb3ecbe385cc8251a.
Removing Issuer and Notice models (bug 833445)
Merge pull request #221 from davidbgk/833445-removing-issuer-notice

 Removing Issuer and Notice models (bug 833445)