qemu-img-rhev can't handle -s parameter

Issue

• After upgrading qemu-img, the following commands fail:

qemu-img convert -f qcow2 -O qcow2 -s
6867519d-dadf-43d6-ab6d-8fa48d3f78c2
/path/folder/6c89c72e-b1b4-a37d-9bca-ab51a254560c
/mnt/807a26d7-5ac0-3fe3-ad6e-45edf6114f2c/snapshots/1/62/6868519a-dade-4a66-bedd-83c4829f78c2

• Now, qemu-img doesn't know the "-s" option:

convert: invalid option -- 's'
qemu-img version 0.12.1, Copyright (c) 2004-2008 Fabrice Bellard
usage: qemu-img command [command options] .....