VOL-3419: Replicate voltha flows in openolt agent
- Use the flow_id, symmetric_flow_id, replication_flag and pbit_to_gemport_map
  coming in Flow proto messge to replicate the flow as needed
- Use the CreateQueues and RemoveQueues messages to setup and remove gem_ports
- Use latest gRPC version 1.31.1 which allows fine tuning of gRPC threadpools
  which allows for greating performance.
- Performance numbers when tested with openolt-scale-tester has been better with
  using latest gRPC and threadpool tuning when compared to earlier. It is to be
  noted that the performance is better even with openolt-agent replicating the flow
  now.
- Scale tests with 512 subscribers have been successfull with BAL3.4.7.5 version
- Use openolt proto version 4.0.0
- Use openolt-test (for unit test) image version 2.0.1 (which bundles latest gRPC version 1.31.1)
- These changes are NOT backward compatible and openolt-agent will have a major
  version bump to 3.0.0

Change-Id: I715c804bdf342e60d08cab6c59e1c21b8c5ac1f4
diff --git a/agent/src/indications.cc b/agent/src/indications.cc
index 1939e60..03f81fe 100644
--- a/agent/src/indications.cc
+++ b/agent/src/indications.cc
@@ -1292,6 +1292,7 @@
     if(rc != BCM_ERR_OK)
         return Status(grpc::StatusCode::INTERNAL, "Packet indication subscribe failed");
 
+#ifndef SCALE_AND_PERF
     rx_cfg.obj_type = BCMOLT_OBJ_ID_ITUPON_ALLOC;
     rx_cfg.rx_cb = ItuPonAllocConfigCompletedInd;
     rx_cfg.flags = BCMOLT_AUTO_FLAGS_NONE;
@@ -1299,6 +1300,7 @@
     rc = bcmolt_ind_subscribe(current_device, &rx_cfg);
     if(rc != BCM_ERR_OK)
         return Status(grpc::StatusCode::INTERNAL, "ITU PON Alloc Configuration Complete Indication subscribe failed");
+#endif
 
     rx_cfg.obj_type = BCMOLT_OBJ_ID_GROUP;
     rx_cfg.rx_cb = GroupIndication;