Use the Chef 'omnitruck' API to download Windows installer.
Use the Chef 'omnitruck' API to download Windows installer.

The www.opscode.com URI that we were using has started to
intermittently return a 403 instead of a 3xx redirect to
packages.chef.io, as expected. The omnitruck.chef.io URI
is the recommended approach, so we'll use that instead.

mdsol/bootscript,mdsol/bootscript,mdsol/bootscript