Use the TaskExecutorJobLauncher instead of SimpleJobLauncher

Fixes gh-1017

Author: kazuki43zoo

src/test/resources/org/mybatis/spring/sample/config/applicationContext-job.xml

@@ -54,7 +54,7 @@
 
   <batch:job-repository/>
 
-  <bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
+  <bean id="jobLauncher" class="org.springframework.batch.core.launch.support.TaskExecutorJobLauncher">
     <property name="jobRepository" ref="jobRepository"/>
   </bean>