packaging: spec: remove openssh dependency fro backend
packaging: spec: remove openssh dependency fro backend

backend does not use openssh directly.

Change-Id: I0dc658218a09a8a19c33d049f23455bcec101f3a
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>

eayun/ovirt-engine,walteryang47/ovirt-engine,zerodengxinchao/ovirt-engine,zerodengxinchao/ovirt-engine,yingyun001/ovirt-engine,eayun/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,zerodengxinchao/ovirt-engine,yapengsong/ovirt-engine,eayun/ovirt-engine,yapengsong/ovirt-engine,eayun/ovirt-engine,walteryang47/ovirt-engine,zerodengxinchao/ovirt-engine,walteryang47/ovirt-engine,halober/ovirt-engine,halober/ovirt-engine,halober/ovirt-engine,walteryang47/ovirt-engine,eayun/ovirt-engine,OpenUniversity/ovirt-engine,yingyun001/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,zerodengxinchao/ovirt-engine,walteryang47/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,halober/ovirt-engine