Fix pending wiki routing spec: correct HTTP verb

* remove query params from expectation, since routing specs do not
  test these.

/ HT: @hschink

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Revert bundle update; Bump rspec-rails version

The previous bundle update of all dependencies broke execution of unit
tests: I've yet to determine a more specific cause.

This partially reverts commit 6ea4ed825f231bd3db47e5a73c7c3874f7deb861.

Signed-off-by: Alex Coles <alex@alexbcoles.com>