packaging: engine-backup: align db creation instructions with dwh
packaging: engine-backup: align db creation instructions with dwh

Replace 'create user' with 'create role'.

Also add a missing quote.

Change-Id: Id11a2746ced31a2731a8f8d76a29b3ea4b6a5478
Bug-Url: https://bugzilla.redhat.com/1040572
Signed-off-by: Yedidyah Bar David <e7f2f616ce8817ad893bbeaad3e942e94c69d323@redhat.com>

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