test different mch_id and appid

mobile/plugins/payment/wxpay.php

@@ -232,7 +232,7 @@ class wxpay
         unset($_SESSION['org_num']);
         // echo "\r\n" . $org_num . "\r\n";
         
-        $this->parameters["mch_id"] = '100018380507D2C'; // 商户号  sc_test
+        $this->parameters["mch_id"] = $org_num; // 商户号  sc_test
 
         // $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR']; // 终端ip
         $this->parameters["nonce_str"] = $payinfo['nonceStr']; // 随机字符串