GRN2-xx: Switch the relation between users and roles to make queries cleaner and faster (#1299)

* First steps

* Fixes in account creation flow

* Fixed most testcases

* more test fixes

* Fixed more test cases

* Passing tests and rubocop

* Added rake task to remove rooms

app/controllers/rooms_controller.rb

@@ -69,7 +69,7 @@ class RoomsController < ApplicationController
 
     # If its the current user's room
     if current_user && (@room.owned_by?(current_user) || @shared_room)
-      if current_user.highest_priority_role.get_permission("can_create_rooms")
+      if current_user.role.get_permission("can_create_rooms")
         # User is allowed to have rooms
         @search, @order_column, @order_direction, recs =
           recordings(@room.bbb_id, params.permit(:search, :column, :direction), true)