pki: fix typo
pki: fix typo

key->cert

Change-Id: Id078c62776324726888d1a5211a0a05565f87bf1
Signed-off-by: Yedidyah Bar David <e7f2f616ce8817ad893bbeaad3e942e94c69d323@redhat.com>

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