qemu.test: add step reboot guest when it resume from s3/s4

1). add step that reboot guest when it recover from s3/s4
2). update workaround_eject_time from 0s to 5s

Signed-off-by: Xu Tian <xutian@redhat.com>
qemu.test: add scenario to eject non-removeable device force

Signed-off-by: Xu Tian <xutian@redhat.com>