Safe to ignore failures and warnings

It is safe to ignore the following warnings or error messages:

• https://github.com/nusenu/ansible-relayor/issues/101
• the following task is expected to fail (most of the times): "Ensure the maintainer's generator is disabled (Debian 8 only)"
• warning about failed task "Check if /etc/resolv.conf contains any Google DNS servers (Exits only)"

.../keys/ed25519_master_id_public_key.
[warn] Master public key was absent; inferring from public key in
signing certificate and saving to disk.```