increase time interval for update ids to 20s

ubuntu_base/opportunistic_utils.py

@@ -240,8 +240,8 @@ class IdsOpportunistic:
             # set a return condition to kill IDS process and restore iptables rules
             IdsOpportunistic.is_stop = True
 
-        # waiting 10s for the procedure finish in case the queue is filled continuously
-        time.sleep(10)
+        # waiting 20s for the procedure finish in case the queue is filled continuously
+        time.sleep(20)
 
 
 def update_unikernel():