Packaging

Revert to @v7 #810

Annotations

4 warnings

Removed centos:7 image from package_build_rules because mirrorlist.centos.org is no longer available

Removed debian:stretch image from package_test_rules because the LXC/Incus image no longer exists

Removed ubuntu:bionic image from package_test_rules because the LXC/Incus image no longer exists

Removed centos:7 image from package_test_rules because Ploutos no longer supports building for CentOS 7