Support Contextual Admin module

The Contextual Admin module has a "Create user" feature, but due to some settings options, it does not directly use the user_register_form form. Instead, it references user_register_form and makes some modifications to #access values. This is done via a form defined as context_admin_user_create_menu_render_form.

I've written a patch that integrates Role Delegation capabilities into Contextual Admin. It is available here for review: https://www.drupal.org/node/2700755 → The problem is Role Delegation is unable to run this functionality because of the difference in $form_id values.

I will post a patch in a few minutes that simply adds context_admin_user_create_menu_render_form to the role_delegation_form_alter function. Doing this allows the patch I've written in Issue #2700755 to work correctly.