Add ability to create Virtual Machine in netbox with an auto-detecting feature (currently VirtualBox, Xen, Hyper-V, VMWare, GCP)
One caveat, I made the choice not to report the disk as Netbox model allow only one size but VM often have multiples.
Also, lot of code refactoring to be able to use create_or_update function style, fixing a lot of corner case
Several minor fixes:
- raid_array check should return an empty array, not NoneType
- not all systems will have IPv6 defined, handle this case
- Vendor Supermicro was incomplete.
