Use minimal APT-based image for host
Test jobs on top of 18.12 minimal: amd64, armhf.
Still using 18.12 as a host platform due kernel issue on v2019pre causing some failures related to AppArmor.
Test jobs on top of 18.12 minimal: amd64, armhf.
Still using 18.12 as a host platform due kernel issue on v2019pre causing some failures related to AppArmor.