engine: Add QoS parameters to VmInfoBuilder

Added the QoS properties to the VmInfoBuilder.

Change-Id: I57bdcc24dfa99b81dc0b89f52e4007da5d6b2412
Signed-off-by: Ofri Masad <omasad@redhat.com>
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>