Less alarming messages
Less alarming messages

Calling out a header with "Failed" is leading some customers astray. The
buildkite-agent meta-data commands are already quite chatty and should
have sufficient output for debugging, without being alarmist about
missing meta-data.

buildkite-plugins/docker-compose,buildkite-plugins/docker-compose-buildkite-plugin,buildkite/docker-compose-buildkite-plugin