Changed DNS Record Default Expiration Time to 25 seconds

It was an hour, which was making impossible to detect changes
in the Active Home mdns beacon in a reasonable amount of time

Change-Id: I283507fa2c4aaf18e7233fc8897d538baeeea561
diff --git a/src/javax/jmdns/impl/constants/DNSConstants.java b/src/javax/jmdns/impl/constants/DNSConstants.java
index 2704f94..b79400b 100644
--- a/src/javax/jmdns/impl/constants/DNSConstants.java
+++ b/src/javax/jmdns/impl/constants/DNSConstants.java
@@ -18,8 +18,8 @@
     public static final int    MDNS_PORT                      = Integer.parseInt(System.getProperty("net.mdns.port", "5353"));
     public static final int    DNS_PORT                       = 53;
 
-    // One hour expiration time 
-    public static final int    DNS_TTL                        = 60 * 60;
+    // DNS Records Expiration Time in Seconds
+    public static final int    DNS_TTL                        = 25;
 
     public static final int    MAX_MSG_TYPICAL                = 1460;
     public static final int    MAX_MSG_ABSOLUTE               = 8972;