Create VMs with autostart flag

[Bischoff]

Sometimes we have to reboot an hypervisor (for example, when we updated it). The VMs will not be running anymore, but terraform.tfstate will reference them as still running, thus puzzling terraform on next run.

I am not sure the libvirt provider allows this, but if there is an option to create the VMs with the autostart flag on, that would resolve that problem.

[agraul]

The provider supports it if I understand the code correctly: https://github.com/dmacvicar/terraform-provider-libvirt/blob/9260f4ce9ba2e24e98c4b7970f85790c5436cf7d/libvirt/resource_libvirt_domain.go#L348