Merge pull request #2162 from liaojianbin/master

mybatis-config.xml parseConfiguration - The environment is already specified. Just break out of the loop

Author: harawata

src/main/java/org/apache/ibatis/builder/xml/XMLConfigBuilder.java

@@ -287,6 +287,7 @@ private void environmentsElement(XNode context) throws Exception {
               .transactionFactory(txFactory)
               .dataSource(dataSource);
           configuration.setEnvironment(environmentBuilder.build());
+          break;
         }
       }
     }