Why: the server does not know the certificates

Why: otherwise provd only uses the base.tpl template

WP-353: Add Grandstream GXP16XX

Reviewed-by: https://github.com/apps/wazo-production-sf

Add missing Yealink W90 metadata

Reviewed-by: https://github.com/apps/wazo-production-sf

revert deletion of v83 phone models

Reviewed-by: https://github.com/apps/wazo-production-sf

commit 6abfbe2d

firmware link update

Reviewed-by: https://github.com/apps/wazo-production-sf

Zuul migration

Yealink v81 w52 56 new firmware

Reviewed-by: https://github.com/apps/wazo-production-zuul

yealink-v83: fix langpacks

Reviewed-by: https://github.com/apps/wazo-production-zuul