
The following are included in the switch to strict confinement: * Set snapcraft.yaml confinement to strict and restore/update plugs * Drop building of python as it's not required for strict snaps * Switch back to running apps under root * Patch setgroups from ngnix since it's not covered by a plug * Build libxml into snap Change-Id: Ibd2e3c625ceb92cb4b6dd9f0c9a9012baf7c53a5