qemu: Don't emit SUSPENDED_POSTCOPY event on destination

When pause-before-switchover QEMU capability is enabled, we get STOP
event before MIGRATION event with postcopy-active state. To properly
handle post-copy migration and emit correct events commit
v4.10.0-rc1-4-geca9d21e added a hack to
qemuProcessHandleMigrationStatus which translates the paused state
reason to VIR_DOMAIN_PAUSED_POSTCOPY and emits
VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY event when migration state changes
to post-copy.

However, the code was effective on both sides of migration resulting in
a confusing VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY event on the destination
host, where entering post-copy mode is already properly advertised by
VIR_DOMAIN_EVENT_RESUMED_POSTCOPY event.

https://bugzilla.redhat.com/show_bug.cgi?id=1791458Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_process.c

@@ -1653,6 +1653,7 @@ qemuProcessHandleMigrationStatus(qemuMonitorPtr mon G_GNUC_UNUSED,
     virDomainObjBroadcast(vm);
 
     if (status == QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY &&
+        priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_OUT &&
         virDomainObjGetState(vm, &reason) == VIR_DOMAIN_PAUSED &&
         reason == VIR_DOMAIN_PAUSED_MIGRATION) {
         VIR_DEBUG("Correcting paused state reason for domain %s to %s",