[dpb]: make sure port is in admin down state before remove port. (son…

…ic-net#1513)

Bring down the port before remove. 

During DPB SET request to bring down the port may get replaced DEL. Make sure to bring down the port before remove.

orchagent/portsorch.cpp

@@ -1819,6 +1819,18 @@ sai_status_t PortsOrch::removePort(sai_object_id_t port_id)
 {
     SWSS_LOG_ENTER();
 
+    Port port;
+
+    /* 
+     * Make sure to bring down admin state.
+     * SET would have replaced with DEL
+     */
+    if (getPort(port_id, port))
+    {
+        setPortAdminStatus(port, false);
+    }
+    /* else : port is in default state or not yet created */
+
     sai_status_t status = sai_port_api->remove_port(port_id);
     if (status != SAI_STATUS_SUCCESS)
     {