Fixes #14824 - strip out extraneous nil from `recognize` call

We had a `_` that was used to eat a `nil` which is no longer needed,
see rails/rails@dd1f23d.

app/controllers/katello/api/rhsm/candlepin_proxies_controller.rb

@@ -435,8 +435,8 @@ def client_authorized?
    def authorize_proxy_routes
      deny_access unless (authenticate || authenticate_client)

      route, _, params = Engine.routes.router.recognize(request) do |rte, match, parameters|
        break rte, match, parameters if rte.name
      route, params = Engine.routes.router.recognize(request) do |rte, parameters|
        break rte, parameters if rte.name
      end

      # route names are defined in routes.rb (:as => :name)