修改ExchangeService 抽象定义msg ， xml ，json 间的转换

src/main/java/com/gzzn/omms/msgexchangeapi/controller/KafkaController.java

@@ -37,7 +37,7 @@ public class KafkaController {
 	    		   kafkaservice.msgSend(topicName, msg);
 			} catch (Exception e) {
 				try {
-				     String jsonStr = exchangeService.xmlstrToJson(msg);
+				     String jsonStr = exchangeService.xmlMsgToJsonMsg(msg);
 				     kafkaservice.msgSend(topicName, jsonStr);
 				} catch (Exception e2) {
 					throw new RuntimeException(e2);