Let docker.service start docker services managed by puppetlabs/docker…

[jhejl]

Systemd units created by puppetlabs/docker defines the dependency on docker.service via Requires=docker.service stanza. This won't let docker-mycontainer.service service start unless docker.service is running.

From time to time there are situations where you stop docker.service (mostly due to docker upgrades / setup changes etc.).
apt-get upgrade (or you) will stop docker.service, systemd will take a care of stopping all services that states Requires=docker.service, docker is being upgraded and started. Unfortunately systemd won't boot up the docker-mycontainer.service as there's no dependency definition.

This PR introduces simple reverse dependency relation between docker container systemd units and docker.service.

[codecov-io]

Codecov Report

Merging #563 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #563   +/-   ##
=======================================
  Coverage   28.02%   28.02%           
=======================================
  Files          19       19           
  Lines         685      685           
=======================================
  Hits          192      192           
  Misses        493      493

Impacted Files	Coverage Δ
lib/puppet/provider/docker_compose/ruby.rb	20.63% <0%> (ø)	⬆️
lib/puppet/provider/docker_stack/ruby.rb	24% <0%> (ø)	⬆️

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[sheenaajay]

Thanks @jhejl for submitting the PR. Could you please add tests to verify the change. Thank you.

[sheenaajay]

[sheenaajay]

Thanks @jhejl for your contribution.