Refactor Package Management

[LongLiveCHIEF]

The existing code has a few inconsistencies and inefficiencies that make it difficult to use with the latest versions of docker.

• remove params related to docker_cs
• docker now supports release channels (stable/edge). Set up params for this
• remove use_upstream_package. The package config can be done by passing repo values, and is actually far more flexibble in this way, by automatically allowing private repos in additon to mirrow without any additional puppet code
• update the default locations for packaging (download.docker.com)
• Leave a note in the following garethr/docker issues if this PR closes them:
• Error while evaluating a Resource Statement, Apt::Source[docker] (#725)
• Support for docker-latest package RHEL7 #698
• (Remove hard (epel, apt) module dependencies, use soft ones #667 (might not be able to)
• Manage repository and package separately #656
• Version #655
• Installation should not use --enablerepo if the upstream repo is used #598