refactor old theme tests
Send data to monolith when we use "send_requests"
remove dead import
Update the monolith-record table.

- do not add the anonymous flag by default (monolith).  This will be part of
  the data we pass and store, but it's not required information.
- rename user into user_hash, since it's a hash.
We now pass an extra information to send_request.
removed old image
clean up Theme Submission form and success page (bug 795966, bug 830988)
save theme images as PNGs and point to the correct spot (bug 795966)