core: osinfo - fail backend startup on coliding os id error

fail loading the backend by throwing a RuntimeException if an osinfo
properties have colliding id's.

e.g

os.linux.id.value = 12345
os.windows.id.value = 12345

obviously wrong and should fail with logged exception

"java.lang.RuntimeException: colliding os id 12345 at node /os/windows/id"

Change-Id: I9f19a1d33336f020b1ff71d9bcfd06eaee45e81d
Bug-Url: https://bugzilla.redhat.com/996055
Signed-off-by: Roy Golan <rgolan@redhat.com>