tests-spice.cfg: Update USB redirection parameters

Signed-off-by: Vaclav Ehrlich <vehrlich@redhat.com>
virttest/qemu_vm.py: Update USB redirection

update creating of USB device for USB redirection

Signed-off-by: Vaclav Ehrlich <vehrlich@redhat.com>
tests/usb_redirection.py: Remake of USB redirection

Update usb redirection test.

Signed-off-by: Vaclav Ehrlich <vehrlich@redhat.com>