GOSSIP-33 Run rat on all installs

src/test/java/org/apache/gossip/ShutdownDeadtimeTest.java

@@ -82,7 +82,7 @@ public class ShutdownDeadtimeTest {
         }
         return total;
       }
-    }).afterWaitingAtMost(20, TimeUnit.SECONDS).isEqualTo(20);
+    }).afterWaitingAtMost(40, TimeUnit.SECONDS).isEqualTo(20);
 
     // shutdown one client and verify that one client is lost.
     Random r = new Random();