Update WxMpServiceImpl.java

1.对应WxMpService类修改getJSSDKPayInfo(Map<String, String> parameters)方法为getPayInfo(Map<String, String> parameters)方法
2.增加，1）扫码支付参数拼装方法：getNativePayInfo(String productId,String outTradeNo, double amt, String body,String ip, String callbackUrl)
2）原来的公众号支付参数拼装方法：getJsapiPayInfo(String openId,String outTradeNo, double amt, String body,String ip, String callbackUrl)
3.在getPayInfo(Map<String, String> parameters)方法中增加codeUrl参数判断，只有在NATIVE方式才返回codeUrl参数。

Author: fxdfxq