terraform-provider-nutanix: Patch to allow some changes to be hotplug

Second patch for the nutanix provider for terraform.
This time it has been merged into master, so is publicly available.

As I wrote in the commit description:

Hot-plug Options (always):

• Name
• Description

Hot-plug Options just when increasing it:

• num_vcpus_per_socket
• num_sockets
• memory_size_mib

Which are the changes that nutanix can perform online (when the VM is running).