Fix vdsClient.repoStats() bad path.

(Or why using your list as a dict is bad.)

Change-Id: Idf7f6c367c83c2d00967e31dda6c9d0ef2fd3e57
Signed-off-by: Eduardo <ewarszaw@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/19764
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-by: Yeela Kaplan <ykaplan@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>