Fix state cleanup

This is a 🔨 for ensuring the `current_user` state is cleared.
Currently we are missing clearing this on `feature` and the new `system`
tests. We could add more `before(:type)` blocks to clear the state. But
that would also mean we may not clear the state when someone else
manually includes the helper.

As we already have a generic `before(:example)` hook to clear the token
auth, there isn't a lot of additional overhead to use this to also clear
the `current_user` state. This also ensures we clear everything even for
those cases where the module was manually included.

Author: cupakromer

lib/kracken/rspec.rb

@@ -80,18 +80,7 @@ def authenticate_user_with_token!
 
     c.before do
       Kracken::Controllers::TokenAuthenticatable.clear_auth_cache
-    end
-
-    c.before(type: :kracken) do
-        Kracken::SpecHelper.current_user = nil
-    end
-
-    c.before(type: :controller) do
-        Kracken::SpecHelper.current_user = nil
-    end
-
-    c.before(type: :request) do
-        Kracken::SpecHelper.current_user = nil
+      Kracken::SpecHelper.current_user = nil
     end
   end
 end