rename variable for clarity

Author: ekoby

ziti/src/samples/java/org/openziti/samples/ZitiContextEvents.java

@@ -45,8 +45,8 @@ public static void main(String[] args) {
                 System.out.printf(">>> status = %s%n", status);
             });
 
-            ziti.onServiceEvent(service -> {
-                System.out.printf(">>> %s = %s%n", service.getService().getName(), service.getType());
+            ziti.onServiceEvent(event -> {
+                System.out.printf(">>> %s = %s%n", event.getService().getName(), event.getType());
             });
 
             Thread.sleep(5000);