Drop odd keys from structure

 * Disable root login by default
 * Drop odd lab users|key

Depends-on: https://gerrit.mcp.mirantis.com/#/c/37641/

Change-Id: I052696aa4662251dfe9db76759fbca18985b8e79
Related-Prod: PROD-27456 (PROD:27456)
12 files changed