Add support for hyperv customize

[giseongeom]

I've found hyperv customize code in my .kitchen.yml not applied. So I manually modified template/Vagrantfile.erb and now it works.

Testing environment:

• Windows 10 64-bit (build 10586 / version 1511) with Hyper-V platform enabled
• ChefDK 0.10.0
• Vagrant 1.8.1
• Kitchen 1.4.2

[mwrock]

👍

[cheeseplus]

+1

[mwrock]

Ran this against a Hyper-V machine and it successfully worked with:

driver:
  name: vagrant
  customize:
    cpus: 2
    memory: 2048