hsm: deleteImage fails because of wrong dictionary use

also, get fake template params before deleting the template.

Change-Id: I81f9a5aa63c0914e3b934046454df64ccd39c269
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=964649
Signed-off-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/17383
Reviewed-by: Ayal Baron <abaron@redhat.com>