hypervisor: Add Vm trait

This VM trait should be implemented by each underlying hypervisor.

Previously created hypervisor object should create the VM based on
already selected hypervisor. This is just the trait definition. For each
of supported hypervisor we need to implement the trait. Later we will
implement this trait for KVM and then Microsoft Hyper-V.

Signed-off-by: Muminul Islam <muislam@microsoft.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

hypervisor/src/lib.rs

@@ -21,6 +21,9 @@
 /// KVM implementation module
 pub mod kvm;
 
+/// Vm related module
+pub mod vm;
+
 /// CPU related module
 mod cpu;