Enable response pipeline for P4Orch.

Author: SRAVANI KANASANI

orchagent/p4orch/p4orch.cpp

@@ -245,6 +245,7 @@ void P4Orch::handleP4rtNotification(
   if (!prev_op.empty() && status.ok()) {
     drain(prev_op);
   }
+  m_publisher.flush();
 }
 
 void P4Orch::handlePortStatusChangeNotification(const std::string &op, const std::string &data)

orchagent/p4orch/p4orch.h

@@ -90,7 +90,8 @@ class P4Orch : public Orch
     swss::NotificationConsumer *m_portStatusNotificationConsumer;
 
     // Sepcial publisher that writes to APPL DB instead of APPL STATE DB.
-    ResponsePublisher m_publisher{"APPL_DB", /*bool buffered=*/true, /*db_write_thread=*/true};
+    // Sepcial publisher that writes to APPL DB instead of APPL STATE DB.
+    ResponsePublisher m_publisher{"APPL_DB", /*bool buffered=*/true};
 
     friend class P4OrchTest;
     friend class p4orch::test::WcmpManagerTest;