[FIX] awesome_owl: main controller takes debug parameter

[kebeclibre]

When changing only resources that are for the browser, it is kinda frustrating to have to put dev=all in the launch command.

Also debug=assets is a fundamental tool to allow debugging live JS.

For those reasons, the tutorials' controller should be able to receive debug parameter

[robodoo]

This PR targets the un-managed branch odoo/tutorials:master-js-web-framework, it needs to be retargeted before it can be merged.