Salt Virt advanced performance tuning support

SaltStackis an open-source software that facilitates configuration management for IT infrastructures. Salt Virt is a component of SaltStack which functions as a cloud controller that offers a high level view of the cloud resources to assist cloud management. It supports a handful of core cloud operations such as virtual machine deployment, inspection, migration, network profiling etc. I propose to make some existing Libvirt API domain properties configurable in Salt Virt in order to provide advanced performance tuning options.