Refactor : refactor the example version to 3.0.4

Author: taojintianxia

examples/pom.xml

@@ -38,7 +38,7 @@
     </modules>
 
     <properties>
-        <revision>3.0.3</revision>
+        <revision>3.0.4</revision>
         <java.version>1.8</java.version>
         <curator.version>5.1.0</curator.version>
         <springframework.version>4.3.4.RELEASE</springframework.version>