用户管理：支持在线维护系统用户

xxl-job-admin/src/main/resources/i18n/message.properties

 login_username_placeholder=请输入登录账号
 login_password_placeholder=请输入登录密码
 login_username_empty=请输入登录账号
-login_username_lt_5=登录账号不应低于5位
+login_username_lt_4=登录账号不应低于4位
 login_password_empty=请输入登录密码
-login_password_lt_5=登录密码不应低于5位
+login_password_lt_4=登录密码不应低于4位
 login_success=登录成功
 login_fail=登录失败
 login_param_empty=账号或密码为空

xxl-job-admin/src/main/resources/i18n/message_en.properties

 login_username_placeholder=Please enter username
 login_password_placeholder=Please enter password
 login_username_empty=Please enter username
-login_username_lt_5=Username length should not be less than 5
+login_username_lt_4=Username length should not be less than 4
 login_password_empty=Please enter password
-login_password_lt_5=Password length should not be less than 5
+login_password_lt_4=Password length should not be less than 4
 login_success=Login success
 login_fail=Login fail
 login_param_empty=Username or password is empty

xxl-job-admin/src/main/resources/static/js/login.1.js

         rules : {  
         	userName : {  
         		required : true ,
-                minlength: 5,
+                minlength: 4,
                 maxlength: 18
             },  
             password : {  
             	required : true ,
-                minlength: 5,
+                minlength: 4,
                 maxlength: 18
             } 
         }, 
         messages : {  
         	userName : {  
                 required  : I18n.login_username_empty,
-                minlength : I18n.login_username_lt_5
+                minlength : I18n.login_username_lt_4
             },
             password : {
             	required  : I18n.login_password_empty  ,
-                minlength : I18n.login_password_lt_5
+                minlength : I18n.login_password_lt_4
                 /*,maxlength:"登录密码不应超过18位"*/
             }
         }, 

xxl-job-admin/src/main/resources/templates/common/common.macro.ftl

                 <li class="nav-click <#if pageName == "index">active</#if>" ><a href="${request.contextPath}/"><i class="fa fa-circle-o text-aqua"></i><span>${I18n.job_dashboard_name}</span></a></li>
 				<li class="nav-click <#if pageName == "jobinfo">active</#if>" ><a href="${request.contextPath}/jobinfo"><i class="fa fa-circle-o text-yellow"></i><span>${I18n.jobinfo_name}</span></a></li>
 				<li class="nav-click <#if pageName == "joblog">active</#if>" ><a href="${request.contextPath}/joblog"><i class="fa fa-circle-o text-green"></i><span>${I18n.joblog_name}</span></a></li>
-                <li class="nav-click <#if pageName == "jobgroup">active</#if>" ><a href="${request.contextPath}/jobgroup"><i class="fa fa-circle-o text-red"></i><span>${I18n.jobgroup_name}</span></a></li>
 				<#if Request["XXL_JOB_LOGIN_IDENTITY"].role == 1>
+                    <li class="nav-click <#if pageName == "jobgroup">active</#if>" ><a href="${request.contextPath}/jobgroup"><i class="fa fa-circle-o text-red"></i><span>${I18n.jobgroup_name}</span></a></li>
                     <li class="nav-click <#if pageName == "user">active</#if>" ><a href="${request.contextPath}/user"><i class="fa fa-circle-o text-purple"></i><span>${I18n.user_manage}</span></a></li>
 				</#if>
 				<li class="nav-click <#if pageName == "help">active</#if>" ><a href="${request.contextPath}/help"><i class="fa fa-circle-o text-gray"></i><span>${I18n.job_help}</span></a></li>

xxl-job-admin/src/main/resources/templates/login.ftl

 			<div class="login-box-body">
 				<p class="login-box-msg">${I18n.admin_name}</p>
 				<div class="form-group has-feedback">
-	            	<input type="text" name="userName" class="form-control" placeholder="${I18n.login_username_placeholder}" value="admin" maxlength="18" >
+	            	<input type="text" name="userName" class="form-control" placeholder="${I18n.login_username_placeholder}" value="admin" maxlength="20" >
 	            	<span class="glyphicon glyphicon-envelope form-control-feedback"></span>
 				</div>
 	          	<div class="form-group has-feedback">
-	            	<input type="password" name="password" class="form-control" placeholder="${I18n.login_password_placeholder}" value="123456" maxlength="18" >
+	            	<input type="password" name="password" class="form-control" placeholder="${I18n.login_password_placeholder}" value="123456" maxlength="20" >
 	            	<span class="glyphicon glyphicon-lock form-control-feedback"></span>
 	          	</div>
 				<div class="row">

xxl-job-admin/src/main/resources/templates/user/user.index.ftl

 				<form class="form-horizontal form" role="form" >
                     <div class="form-group">
                         <label for="lastname" class="col-sm-2 control-label">${I18n.user_username}<font color="red">*</font></label>
-                        <div class="col-sm-8"><input type="text" class="form-control" name="username" placeholder="${I18n.system_please_input}${I18n.user_username}" maxlength="50" ></div>
+                        <div class="col-sm-8"><input type="text" class="form-control" name="username" placeholder="${I18n.system_please_input}${I18n.user_username}" maxlength="20" ></div>
                     </div>
                     <div class="form-group">
                         <label for="lastname" class="col-sm-2 control-label">${I18n.user_password}<font color="red">*</font></label>
-                        <div class="col-sm-8"><input type="text" class="form-control" name="password" placeholder="${I18n.system_please_input}${I18n.user_password}" maxlength="50" ></div>
+                        <div class="col-sm-8"><input type="text" class="form-control" name="password" placeholder="${I18n.system_please_input}${I18n.user_password}" maxlength="20" ></div>
                     </div>
                     <div class="form-group">
                         <label for="lastname" class="col-sm-2 control-label">${I18n.user_role}<font color="red">*</font></label>
 				<form class="form-horizontal form" role="form" >
                     <div class="form-group">
                         <label for="lastname" class="col-sm-2 control-label">${I18n.user_username}<font color="red">*</font></label>
-                        <div class="col-sm-8"><input type="text" class="form-control" name="username" placeholder="${I18n.system_please_input}${I18n.user_username}" maxlength="50" readonly ></div>
+                        <div class="col-sm-8"><input type="text" class="form-control" name="username" placeholder="${I18n.system_please_input}${I18n.user_username}" maxlength="20" readonly ></div>
                     </div>
                     <div class="form-group">
                         <label for="lastname" class="col-sm-2 control-label">${I18n.user_password}<font color="red">*</font></label>
-                        <div class="col-sm-8"><input type="text" class="form-control" name="password" placeholder="${I18n.user_password_update_placeholder}" maxlength="50" ></div>
+                        <div class="col-sm-8"><input type="text" class="form-control" name="password" placeholder="${I18n.user_password_update_placeholder}" maxlength="20" ></div>
                     </div>
                     <div class="form-group">
                         <label for="lastname" class="col-sm-2 control-label">${I18n.user_role}<font color="red">*</font></label>