sos: Support SOS version 3

This patch will add support to sos 3 API and keep compatible
with old API.

Change-Id: I52fbd9431506c5862cc762b4d3f0701ab5cf6a0b
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1060383
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/25188
Reviewed-by: Dan Kenigsberg <danken@redhat.com>