packaging: update python-cpopen requirement to 1.3

update both dependencies and build dependencies to
python-cpopen 1.3.

Change-Id: I01cbf9668beff756051f61878fa1c8a5b3581295
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1068786
Reviewed-on: http://gerrit.ovirt.org/#/c/23468/
Signed-off-by: Francesco Romani <fromani@redhat.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/24874
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>