Refactor and modularize edgeconfig scripts

- Entirely new netbox helper functions, using pynetbox and objects,
  instead of previous spaghetti code
- Allow for VM interfaces
- Allow device names to specify more than one segment of the DNS subdomain
- Split out forward and reverse DNS
- Fix issues with DHCP zone creation
- Support advertising NTP server via DHCP option

Playbooks
- Add QA, router, DNS, and user creation/config playbook
- Fix YAML formatting issues with playbooks

Change-Id: Id6c010ef1e122f4fd1bd97e9bb2128c4271947d0
20 files changed