revise spring namespace config file for XA example.

sharding-jdbc-example/transaction-example/transaction-2pc-xa-example/transaction-xa-spring-namespace-example/src/main/resources/META-INF/application-master-slave.xml

 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
@@ -12,8 +29,10 @@
                         http://www.springframework.org/schema/tx/spring-tx.xsd
                         http://shardingsphere.apache.org/schema/shardingsphere/masterslave
                         http://shardingsphere.apache.org/schema/shardingsphere/masterslave/master-slave.xsd">
-    <context:component-scan base-package="io.shardingsphere.example.common.mybatis" />
-    
+
+    <import resource="classpath:META-INF/shardingTransaction.xml"/>
+
+    <context:component-scan base-package="io.shardingsphere.example" />
     <bean id="demo_ds_master" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">
         <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
         <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/demo_ds_master?useSSL=false"/>

sharding-jdbc-example/transaction-example/transaction-2pc-xa-example/transaction-xa-spring-namespace-example/src/main/resources/META-INF/application-sharding-databases-tables.xml

@@ -12,7 +12,10 @@
                         http://www.springframework.org/schema/context/spring-context.xsd
                         http://shardingsphere.apache.org/schema/shardingsphere/sharding
                         http://shardingsphere.apache.org/schema/shardingsphere/sharding/sharding.xsd">
-    <context:component-scan base-package="io.shardingsphere.example.common.mybatis" />
+
+    <import resource="classpath:META-INF/shardingTransaction.xml"/>
+
+    <context:component-scan base-package="io.shardingsphere.example" />
     
     <bean id="demo_ds_0" class="com.zaxxer.hikari.HikariDataSource" destroy-method="close">
         <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
@@ -43,7 +46,7 @@
             </sharding:table-rules>
         </sharding:sharding-rule>
         <sharding:props>
-            <prop key="sql.show">true</prop>
+            <prop key="sql.show">false</prop>
         </sharding:props>
     </sharding:data-source>