Move Chef directory before upgrade on Windows
Move Chef directory before upgrade on Windows

Fixes https://github.com/chef/chef/issues/4623

By moving the directory, the chef-client can continue to access open files.
We then delete the old directory on a subsequent run where we would now be
using files in the standard directory.

Tested Chef 12.5.1   -> Chef 12.17.44
Tested Chef 12.15.19 -> Chef 12.17.44

Signed-off-by: Bryan McLellan <9da9e2973b9c72b95f1bc7169993146760fceeb1@chef.io>

chef-cookbooks/omnibus_updater