packaging: conf: re-add retry to apache proxy
packaging: conf: re-add retry to apache proxy

removed at 734ba5516ae8 with no apparent reason.

Change-Id: Ic43c8f10a38c5606ad59a92f05f7354ee6cd6287
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>

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