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/device/asgvolt64/mkdebian/debian/asgvolt64.preinst b/agent/device/asgvolt64/mkdebian/debian/asgvolt64.preinst
index 333bcd5..c2e0343 100644
--- a/agent/device/asgvolt64/mkdebian/debian/asgvolt64.preinst
+++ b/agent/device/asgvolt64/mkdebian/debian/asgvolt64.preinst
@@ -54,8 +54,7 @@
 
 rm -rf  /broadcom
 
-rm -rf /usr/local/lib/libgrpc++.so.1
-rm -rf /usr/local/lib/libgrpc.so.6
+rm -rf /usr/local/lib/libz.so.1
 rm -rf /usr/local/lib/libbal_host_api.so
 rm -rf /usr/local/lib/libstdc++.so.6