Set tracing probability to 100% on sample apps

Author: onobc

spring-pulsar-sample-apps/src/main/resources/application.yml

@@ -5,6 +5,8 @@ logging:
 management:
   tracing:
     enabled: false
+    sampling:
+      probability: 1.0
   zipkin:
     tracing:
       endpoint: "http://localhost:9411/api/v2/spans"