packaging: setup: restart websocket proxy in upgrade only if available
packaging: setup: restart websocket proxy in upgrade only if available

Change-Id: Id962920b0f6cf9a2db21791e66a285ed8b4d1387
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>

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