Fix failed tests (#282)

diff --git a/dubbo-samples-async/dubbo-samples-async-onerror/pom.xml b/dubbo-samples-async/dubbo-samples-async-onerror/pom.xml
index f20ac95..f5c4ca4 100644
--- a/dubbo-samples-async/dubbo-samples-async-onerror/pom.xml
+++ b/dubbo-samples-async/dubbo-samples-async-onerror/pom.xml
@@ -99,23 +99,6 @@
                 <version>${dubbo.configcenter.zookeeper.version}</version>
             </dependency>
             <dependency>
-                <groupId>org.apache.dubbo</groupId>
-                <artifactId>dubbo-dependencies-zookeeper</artifactId>
-                <version>${dubbo.version}</version>
-                <type>pom</type>
-            </dependency>
-            <dependency>
-                <groupId>org.apache.curator</groupId>
-                <artifactId>curator-x-discovery</artifactId>
-                <version>4.0.1</version>
-                <exclusions>
-                    <exclusion>
-                        <groupId>org.apache.zookeeper</groupId>
-                        <artifactId>zookeeper</artifactId>
-                    </exclusion>
-                </exclusions>
-            </dependency>
-            <dependency>
                 <groupId>org.apache.curator</groupId>
                 <artifactId>curator-framework</artifactId>
                 <version>${curator.version}</version>
@@ -201,6 +184,16 @@
             <artifactId>zookeeper</artifactId>
         </dependency>
         <dependency>
+            <groupId>org.apache.curator</groupId>
+            <artifactId>curator-x-discovery</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.apache.zookeeper</groupId>
+                    <artifactId>zookeeper</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo</artifactId>
         </dependency>