CA-97427: Create error in vm_plan for VMs with VDI's using IntelliCache
while computing evacuation plan.

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
Merge pull request #1231 from siddharthv/CA-97427-CW

CA-97427: Create error in vm_plan for VMs with VDI's using IntelliCache while computing evacuation plan.