Add TR-069 support to CNPilot entreprise AP

Since those gateway are mostly behind customer router and that a lot of us as to work with several brand, I think it would be a good idea to add TR-069 support.

TR-069 is expected from carrier class devices since carrier mostly want standard protocol  that can be use with multiple brand, that can be easily added to their current management platform without dev.

You may not have lot's of demand for this but carrier won't ask to support a feature, the will just pass to the next product that meet requirement.