RHEL7 works with systemd and requires systemd macros and tmpfiles.d conf

Change-Id: I176d1770fed745e1cf2cab45a55544ccdd6f25fc
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1122198
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/30820
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/33021
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>