Add CPU pinning data to InstanceNUMACell  object

We will use this object to hold the data about CPU pinning for each
instance. We add the CPU pinning and topology information to each
InstanceNUMACell. We will use this information to track pinning of each
instance.

Change-Id: Ic299e474ea210c9028a046b2665c0021fb2baf06
Blueprint: virt-driver-cpu-pinning
Merge "Add CPU pinning data to InstanceNUMACell  object"