Description of problem:
there's twice 'Default OS' value in 'Operating System' selection box

it looks like issue when parsing osinfo-defaults.properties

# fgrep os.Unassigned /usr/share/ovirt-engine/conf/osinfo-defaults.properties | sort -t \. -k 2 -V
os.Unassigned.bus.value = 32
os.Unassigned.cpuArchitecture.value = x86
os.Unassigned.devices.audio.value = ich6
os.Unassigned.devices.network.value =  rtl8139, e1000, pv
os.Unassigned.family.value = Other
os.Unassigned.id.value = 0
os.Unassigned.name.value = default OS
os.Unassigned.resources.maximum.ram.value = 64000
os.Unassigned.resources.minimum.disksize.value = 1
os.Unassigned.resources.minimum.numberOsCpus.value = 1
os.Unassigned.resources.minimum.ram.value = 256
os.Unassigned.spiceSupport.value = true
os.Unassigned_64.bus.value = 64
os.Unassigned_64.derivedFrom.value = Unassigned
os.Unassigned_64.id.value = 1000
os.Unassigned_64.resources.minimum.ram.value = 1024
os.Unassigned_64.resources.recommended.ram.value = 2000

so 'Unassigned_64' is useless, as it does not have specific 'name', thus it inherits 'name' from Unassigned. This causes 'Unassinged' to be lottery, which 'Default OS' in VM properties is the one a user wants? :)

Version-Release number of selected component (if applicable):
IS4

How reproducible:
100%

Steps to Reproduce:
1. check VM properties for 'Operating system' values in the list
2. check /usr/share/ovirt-engine/conf/osinfo-defaults.properties
3.

Actual results:
Unassigned_64 does not have name, thus it uses 'Default OS' as Unassigned

Expected results:
second column in osinfo property line should always have 'name' value. it means that if you have os.foo..... then you _MUST_ have os.foo.id.value and os.foo.name.value

Additional info: