[grid] Add default sessionTimeout to NodeStatus to increase backward compatibility

Signed-off-by: Viet Nguyen Duc <[email protected]>

Author: VietND96

java/src/org/openqa/selenium/grid/data/NodeStatus.java

@@ -76,7 +76,7 @@ public static NodeStatus fromJson(JsonInput input) {
     Set<Slot> slots = null;
     Availability availability = null;
     Duration heartbeatPeriod = null;
-    Duration sessionTimeout = null;
+    Duration sessionTimeout = Duration.ofSeconds(300);
     String version = null;
     Map<String, String> osInfo = null;