Migration/colo.c: Make COLO node running after failover

Delay to close COLO for auto start VM after failover.
Signed-off-by: NZhang Chen <chen.zhang@intel.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190303145021.2962-4-chen.zhang@intel.com>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

migration/colo.c

@@ -874,7 +874,6 @@ out:
         qemu_fclose(mis->to_src_file);
         mis->to_src_file = NULL;
     }
-    migration_incoming_disable_colo();
 
     rcu_unregister_thread();
     return NULL;

migration/migration.c

@@ -417,6 +417,9 @@ static void process_incoming_migration_bh(void *opaque)
         } else {
             runstate_set(RUN_STATE_PAUSED);
         }
+    } else if (migration_incoming_colo_enabled()) {
+        migration_incoming_disable_colo();
+        vm_start();
     } else {
         runstate_set(global_state_get_runstate());
     }