Fix inconsistency between camelize true vs snakecase_input

As it was my soap_actions where stored as camelizedAction but since I had `snakecase_input = true` it would snakecase the input before checking against `controller.soap_actions[soap_action]` which means that no matter what the hell I tried it wasn't finding any soap actions.

This commit fixes that problem. However obviously there is a failing spec but since I am unsure if you want the fix here or on the other end meaning camelize the before fetching it in https://github.com/inossidabile/wash_out/blob/master/lib/wash_out/router.rb#L67 I'll await further instructions before doing anything else.