GRN2-176: Create a role editor that allows admins to specify what permissions each role has (#709)

* Add roles editor

* Add colour selection ability to roles

* Add ability to assign roles to users in the UI

* Remove rolify and replace it with our own custom roles implemenation

* - Fix all existing roles functionality
- Fix super admins

* Fix bugs with new customers not have default roles

* Add can't create room setting

* Code improvements

* Fix migration

* Add tests for new methods

* Translate reserved role names

* Pull roles from saml/ldap

* Fix rspec

* Fix scrutinizer issues

* Fix email promoted/demoted tests

* Apply comments

* Redirect directly to the main room

* Add comments

app/controllers/application_controller.rb

@@ -137,7 +137,7 @@ class ApplicationController < ActionController::Base
 
   # Checks to make sure that the admin has changed his password from the default
   def check_admin_password
-    if current_user&.has_cached_role?(:admin) && current_user&.greenlight_account? &&
+    if current_user&.has_role?(:admin) && current_user&.greenlight_account? &&
        current_user&.authenticate(Rails.configuration.admin_password_default)
 
       flash.now[:alert] = I18n.t("default_admin",
@@ -185,10 +185,10 @@ class ApplicationController < ActionController::Base
 
   # Checks if the user is banned and logs him out if he is
   def check_user_role
-    if current_user&.has_cached_role? :denied
+    if current_user&.has_role? :denied
       session.delete(:user_id)
       redirect_to root_path, flash: { alert: I18n.t("registration.banned.fail") }
-    elsif current_user&.has_cached_role? :pending
+    elsif current_user&.has_role? :pending
       session.delete(:user_id)
       redirect_to root_path, flash: { alert: I18n.t("registration.approval.fail") }
     end