use static import

bubble-server/src/main/java/bubble/service/device/FlexRouterService.java

@@ -19,6 +19,7 @@ import org.springframework.stereotype.Service;
 
 import java.util.List;
 
+import static bubble.model.device.FlexRouterPing.MAX_PING_AGE;
 import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.cobbzilla.util.daemon.ZillaRuntime.shortError;
@@ -32,7 +33,7 @@ public class FlexRouterService extends SimpleDaemon {
     public static final int MAX_PING_TRIES = 5;
     private static final long PING_SLEEP_FACTOR = SECONDS.toMillis(2);
 
-    public static final int DEFAULT_PING_TIMEOUT = (int) SECONDS.toMillis(FlexRouterPing.MAX_PING_AGE/2);
+    public static final int DEFAULT_PING_TIMEOUT = (int) SECONDS.toMillis(MAX_PING_AGE/2);
 
     public static final RequestConfig DEFAULT_PING_REQUEST_CONFIG = RequestConfig.custom()
             .setConnectTimeout(DEFAULT_PING_TIMEOUT)