iotests/102: Pass $QEMU_HANDLE to _send_qemu_cmd

The first parameter passed to _send_qemu_cmd is supposed to be the
$QEMU_HANDLE.  102 does not do so here, fix it.

As a result, the output changes: Now we see the prompt this command is
supposedly waiting for before the resize message - as it should be.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20201217153803.101231-2-mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2 files changed