[Libvirt-cim] [PATCH 0 of 2] Add KVM CDROM support

This set adds some KVM CDROM support to model these device types differently, using the CIM_CDROMDrive class. Also, support changing the Address property to eject or uneject the virtual drive as appropriate. These have been in my queue for a long time, but after finishing up some bits, they seem to work for me. We'll definitely want some test suite coverage for this.