docker-engine installer

[pirog]

We need a separate node package that will install docker engine on linux (and eventually mac/windows?). it should:

• be able to be invoked programmatically and via OCLIF CLO via OCLIF plugin
• be able to be invoked be a GUI or CLI tool eg needs sudo gui password prompt support
• run as unattended as possible
• be tested
• have needed pre-flight checks
• have needed post-flight verifications
• have an easy way to support multiple versions
• do required post flight installation steps eg add user to docker group