Revert "Bump docker to 18.03.1-ce and docker-compose to 1.22.0"
Revert "Bump docker to 18.03.1-ce and docker-compose to 1.22.0"

holmesjr/elastic-ci-stack-for-aws,holmesjr/elastic-ci-stack-for-aws,buildkite/elastic-ci-stack-for-aws