Update applicationContext.xml

http://www.springframework.org/schema/data/jpa/spring-jpa.xsd会报这个错误：Referenced file contains errors (http://www.springframework.org/schema/tool/spring-tool.xsd). For 
 more information, right click on the message in the Problems View and select "Show Details..."
Merge pull request #19 from smratx/patch-1

Update applicationContext.xml