Change in chocolatey install breaks boxstarter.ps1 for 2012 core

[dfrohlich]

Hello,

I encountered an issue while using the win2012 packer template to build an image. Long story short, chocolatey made a change detailed in this issue https://github.com/chocolatey/chocolatey.org/issues/432 that broke the install of chocolatey on win2012 core servers.

To fix this, I add to add this line to the beginning of boxstarter.ps1, prior to it downloading and calling bootstrap.ps1:

$env:chocolateyUseWindowsCompression = "false"

Hope that helps other people who encounter this.