Use virtualbox on windows for integration tests

[r2d4]

No description provided.

[codecov-io]

Codecov Report

Merging #2024 into master will increase coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2024      +/-   ##
==========================================
+ Coverage    29.6%   29.69%   +0.09%     
==========================================
  Files          77       77              
  Lines        4810     4842      +32     
==========================================
+ Hits         1424     1438      +14     
- Misses       3204     3218      +14     
- Partials      182      186       +4

Impacted Files	Coverage Δ
pkg/minikube/machine/cache_images.go	10.05% <0%> (+7.86%)	⬆️

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[gbraad]

What are actually the issues on Windows with HyperV?

[r2d4]

@gbraad We've had a lot of trouble automating the creation and the continued use of the virtual switches. Before this, we weren't actually running any windows CI tests for awhile, since the physical machine we test on was totally broken.

I fixed it up, but I don't really have a ton of cycles to maintain it, so we're just switching this over the virtualbox, which doesn't have the complexity of the virtual switches.