Ubuntu 16.04 vagrant/vmware boxes are now using the Hyper-v preseed file

[edmorley]

I just tried to confirm the fix for #838 in the newly released 2.3.8, however /etc/apt/sources.list was unchanged.

I believe the reason is that #844 inadvertently switched not just the new Hyper-V build to using ubuntu/preseed-hyperv.cfg, but also the vagrant/vmware boxes to it too:
5efa9c0#diff-f301f105a4ad959494d6bd5d0eec227aL272

That line needs reverting.

In addition, #844 ideally should have made the same changes to preseed-hyperv.cfg when rebasing against master, as were made to the main preseed file in #838, per:
#844 (comment)

[edmorley]

I've opened #865.