Accept Merge Request #150 前台表单验证再次统一，改密码功能改动，后台用户名显示，去重复代码 : (dev-sxw -> dev)

Merge Request: 前台表单验证再次统一，改密码功能改动，后台用户名显示，去重复代码
Created By: @esp
Accepted By: @esp
URL: https://coding.net/u/virusdefender/p/qduoj/git/merge/150

static/src/js/app/oj/account/change_password.js

@@ -2,13 +2,12 @@ require(["jquery", "bsAlert", "csrfToken", "validator"], function ($, bsAlert, c
 
     $('form').validator().on('submit', function (e) {
         e.preventDefault();
-        var username = $("#username").val();
         var newPassword = $("#new_password ").val();
         var password = $("#password").val();
         $.ajax({
             beforeSend: csrfTokenHeader,
             url: "/api/change_password/",
-            data: {username: username, new_password: newPassword, old_password: password},
+            data: {new_password: newPassword, old_password: password},
             dataType: "json",
             method: "post",
             success: function (data) {