update example tests

Author: ndyakov

example_instrumentation_test.go

@@ -78,6 +78,8 @@ func ExamplePipeline_instrumentation() {
 	// finished dialing tcp :6379
 	// starting processing: <[hello 3]>
 	// finished processing: <[hello 3]>
+	// starting processing: <[client maint_notifications on moving-endpoint-type external-ip]>
+	// finished processing: <[client maint_notifications on moving-endpoint-type external-ip]>
 	// pipeline finished processing: [[ping] [ping]]
 }
 
@@ -99,6 +101,8 @@ func ExampleClient_Watch_instrumentation() {
 	// finished dialing tcp :6379
 	// starting processing: <[hello 3]>
 	// finished processing: <[hello 3]>
+	// starting processing: <[client maint_notifications on moving-endpoint-type external-ip]>
+	// finished processing: <[client maint_notifications on moving-endpoint-type external-ip]>
 	// finished processing: <[watch foo]>
 	// starting processing: <[ping]>
 	// finished processing: <[ping]>