Defaults from common and cookiecutter now give working appliance

[wtripp180901]

• Enables etc_hosts by default for working internal DNS
• OpenOndemand now has working set of default variables
• Creates default user to access OOD with
• Default cluster suffix is now "internal" instead of "invalid"

[sjpb]

@wtripp180901 when you get back to this pls can you update docs/production.md too?