Support for creating MCS machine catalogs in a vSAN 8 environment

This feature enables MCS to provision VMs on vSAN 8.   Previously provisioning a VM on vSAN 8 would cause the host to become unresponsive.

Refer to KB articles for details:

https://support.citrix.com/article/CTX547459/creating-a-machine-catalogue-in-a-vsphere-8-environment-causes-host-to-become-unresponsive

https://support.citrix.com/article/CTX131239/supported-hypervisors-for-citrix-virtual-apps-and-desktops-and-provisioning-provisioning-services