Support Virtualbox 5.1

[zippy1981]

I'm not on a machine I can send a PR from, but these exact steps with the obvious modifications work.

I looked briefly at the release notes and I don't think there are any new configuration options worth tweaking the driver over.

[sethvargo]

Hi there,

Vagrant already supports VirtualBox 5.0. I just looked and there does not seem to be downloads for VirtualBox 5.1 yet: https://www.virtualbox.org/wiki/Downloads

[jfilip]

@sethvargo FWIW you can download the current beta from this forum post: https://forums.virtualbox.org/viewtopic.php?f=15&t=78053

[zippy1981]

@sethvargo there is a beta. there have actually been two 5.1 beta releases. Now would be the time to add support, for detecting the versions. Of course auto downloading would not make sense.

[sethvargo]

Hi @zippy1981

It is our general policy that we do not add support for the beta versions until they are officially released. It is very common for the betas to have bugs or broken functionality that is resolved before the final release. Vagrant often gets blamed for these bugs, so it's our policy to not add support until the release is made official. I'll keep this issue open until then. Thank you for understanding!

[gtirloni]

Vagrant 1.8.4 works fine with VirtualBox 5.1 BETA3 (5.1.0_BETA3r108118), after modifying the code manually. Tested bidirectional clipboard, synced folders and port forwarding on a Fedora 24 box.

[Stanzilla]

5.1 is now final https://www.virtualbox.org/wiki/Changelog

[dominikzogg]

Add version in:

embedded/gems/gems/vagrant-1.8.4/plugins/providers/virtualbox/driver/meta.rb:64
embedded/gems/gems/vagrant-1.8.4/plugins/providers/virtualbox/plugin.rb:58

Copy file:

embedded/gems/gems/vagrant-1.8.4/plugins/providers/virtualbox/driver/version_5_0.rb =>
embedded/gems/gems/vagrant-1.8.4/plugins/providers/virtualbox/driver/version_5_1.rb

Replace the version in the copied file