Use request.GET and request.POST instead of request.params in abstract_store

[crystalneth]

To avoid caching of parsed request params before appropriate and fix #5670.

(Second pull request. First one I didn't push properly.)

[crystalneth]

#5670

[rafaelfranca]

I'm closing this since it point 3-0-stable and we don't accept pull request for that branch anymore.

[Angelamri]

You say rails/rails is this group about amtrak or other companies i am looking for work and just wanted to ask the inside if there where opening maybe? You don't have to answer this too. i have a friend or two there but i am on my own searching i can unwatch thanks.