colo-compare: use g_timeout_source_new() to process the stale packets
Instead of using qemu timer to process the stale packets,
We re-use the colo compare thread to process these packets
by creating a new timeout coroutine.
Besides, since we process all the same vNIC's net connection/packets
in one thread, it is safe to remove the timer_check_lock.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Signed-off-by: Jason Wang <jasowang@redhat.com>