tools: examples in man page incorrect (#757158)
tools: examples in man page incorrect (#757158)

https://bugzilla.redhat.com/757158

Fixed usage example to:
engine-iso-uploader --iso-domain=ISO upload /mnt/stuff/abc.iso

Change-Id: I96471582f6b7db84149c372076ccd9d9ddfce041

oVirt/ovirt-iso-uploader,oVirt/ovirt-iso-uploader