Adding open-vm-tools to core group

[Ravindra Kumar]

> and why?

open-vm-tools are required for anything that requires
co-ordination with the guest. Here are a few examples,
clean shutdown of guest from VM management interface,
guest consistent snapshots, collection/display of guest
resource usage information in VM management interface,
guest automation (running commands inside guest) and
other features VDR/HA as you mentioned.

> why should anybody need openvm-tools on a non VMware guest?

I believe for P2V and V2V use cases.

Thanks,
Ravindra