New create_user parameter on main class

[traylenator]

Currently when specifying docker_users every user is
both created and added to the docker group.

If create_user is false then the users are presumed to exist
via another method outside this module and will only be added to
the docker group.

Fixes #840

[CLAassistant]

All committers have signed the CLA.

[puppet-community-rangefinder]

docker::config is a class

that may have no external impact to Forge modules.

docker is a class

Breaking changes to this file WILL impact these 17 modules (exact match):

• puppetlabs-cd4pe
• autostructure-docker_ee
• mindhive-nvidia_docker_runtime
• maany-simple_grid
• simp-simp_docker
• ffquintella-dockerapp
• glorpen-g_docker
• gennadyvoronkov-dcos
• walkamongus-harbor
• samuelson-dockeragent
• dodevops-hanaexpress
• tomkrieger-remediate_install
• knoppi-jitsi
• maeq-storj
• fervid-docker_ee
• puppetlabs-data_entitlement
• martyewings-githubactionboard

Breaking changes to this file MAY impact these 24 modules (near match):

• vshn-gitlab
• puppet-gitlab_ci_runner
• pltraining-classroom
• pltraining-puppetfactory
• prozeta-portauthority
• cristifalcas-flannel
• pltraining-dockeragent
• scottyc-docker_swarm
• tsuru-router
• praekeltfoundation-seed_stack
• hesco-weave
• tsuru-registry
• jefferyb-kualicoeus
• autostructure-secure_docker
• tsuru-redis_service
• justin8-ghost
• pltraining-selfpaced
• Azcender-profile
• nick-rancher
• maasch-iot_provisioning
• pltraining-classroom_legacy
• c0deaddict-gogs
• flyer-docker_cluster
• jantman-archlinux_workstation

This module is declared in 6 of 579 indexed public Puppetfiles.

---

These results were generated with Rangefinder, a tool that helps predict the downstream impact of breaking changes to elements used in Puppet modules. You can run this on the command line to get a full report.

Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.

[traylenator]

CLA has been signed on behalf of CERN IT with PuppetLabs.

[smortex]

Looks reasonable!