fixup of b68b3f17

The VM will use the DNS server coming from qemu-kvm (see
https://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29)
so it will actually use the DNS from the host machine.

fixup of b68b3f17

fixup of 0619932c (keep using insecure
http repository for debian 8, 9 and 10)

both playbooks need to run frequently on ORS which caused conflicts

Printing the string "Build successful, connect to:" in the logs is the
success flag when running Test Suites.

fixup! for b31bcacd

Fix up e4f1ee5f (Fix up: update variables too.)