Deferring force layout until quiet period.

Change-Id: I24c66eb695ece45df2b0291f42ccf7d980cad535
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java b/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java
index 958ad32..4df3edf 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/UiWebSocket.java
@@ -42,7 +42,7 @@
 
     private static final Logger log = LoggerFactory.getLogger(UiWebSocket.class);
 
-    private static final long MAX_AGE_MS = 15_000;
+    private static final long MAX_AGE_MS = 30_000;
 
     private static final byte PING = 0x9;
     private static final byte PONG = 0xA;