Add guest definition for EuroLinux

[jaromaz]

Add EuroLinux distro guests seen as Red Hat guests.

[hashicorp-cla]

All committers have signed the CLA.

[soapy1]

Hi there,
thanks for opening up an issue for adding support to a guest plugin. The fastest way to make your plugin available is to build it as an external plugin! We have some template repositories setup so building a new guest plugin should take you no time, and you get to keep control over it's own release cycle. Check out the Ruby template or the Golang template.

For more information on writing plugins see the docs on plugin development. For more information on managing Vagrant plugins see the docs on plugin usage.