[DualToR] Handle race condition between tunnel_decap and mux orchestr…

…ator (sonic-net#2397)

*Change orch list to make sure mux_orch and mux_cb_orch are placed after tunnel_decap_orch

orchagent/muxorch.cpp

@@ -1280,8 +1280,6 @@ bool MuxOrch::handlePeerSwitch(const Request& request)
 
     if (op == SET_COMMAND)
     {
-        mux_peer_switch_ = peer_ip;
-
         // Create P2P tunnel when peer_ip is available.
         IpAddresses dst_ips = decap_orch_->getDstIpAddresses(MUX_TUNNEL);
         if (!dst_ips.getSize())
@@ -1316,6 +1314,7 @@ bool MuxOrch::handlePeerSwitch(const Request& request)
         }
 
         mux_tunnel_id_ = create_tunnel(&peer_ip, &dst_ip, tc_to_dscp_map_id, tc_to_queue_map_id, dscp_mode_name);
+        mux_peer_switch_ = peer_ip;
         SWSS_LOG_NOTICE("Mux peer ip '%s' was added, peer name '%s'",
                          peer_ip.to_string().c_str(), peer_name.c_str());
     }

orchagent/orchdaemon.cpp

@@ -346,7 +346,7 @@ bool OrchDaemon::init()
      * when iterating ConsumerMap. This is ensured implicitly by the order of keys in ordered map.
      * For cases when Orch has to process tables in specific order, like PortsOrch during warm start, it has to override Orch::doTask()
      */
-    m_orchList = { gSwitchOrch, gCrmOrch, gPortsOrch, gBufferOrch, gFlowCounterRouteOrch, mux_orch, mux_cb_orch, gIntfsOrch, gNeighOrch, gNhgMapOrch, gNhgOrch, gCbfNhgOrch, gRouteOrch, gCoppOrch, gQosOrch, wm_orch, gPolicerOrch, tunnel_decap_orch, sflow_orch, gDebugCounterOrch, gMacsecOrch, gBfdOrch, gSrv6Orch};
+    m_orchList = { gSwitchOrch, gCrmOrch, gPortsOrch, gBufferOrch, gFlowCounterRouteOrch, gIntfsOrch, gNeighOrch, gNhgMapOrch, gNhgOrch, gCbfNhgOrch, gRouteOrch, gCoppOrch, gQosOrch, wm_orch, gPolicerOrch, tunnel_decap_orch, sflow_orch, gDebugCounterOrch, gMacsecOrch, gBfdOrch, gSrv6Orch, mux_orch, mux_cb_orch};
 
     bool initialize_dtel = false;
     if (platform == BFN_PLATFORM_SUBSTRING || platform == VS_PLATFORM_SUBSTRING)