Remove acceptance tests not using the resource test framework.
Remove acceptance tests not using the resource test framework.

Without using the resources, the test provider has no life-cycle and depends
on resource acceptance tests to have run first and initialize the provider.

These tests are covered by the resource Read method, so they are redundant.

dmacvicar/terraform-provider-libvirt,dmacvicar/terraform-provider-libvirt,dmacvicar/terraform-provider-libvirt