调度中心密码限制18位，修复修改密码超过18位无法登陆的问题；

doc/XXL-JOB官方文档.md

 - 16、[ING]调度日志优化：支持设置日志保留天数，过期日志天维度记录报表，并清理；调度报表汇总实时数据和报表；
 - 17、[ING]父子任务参数传递；流程任务等，透传动态参数；
 - 18、[ING]调度中心任务平均分配，触发组件每次获取与线程池数量相关数量的任务，避免大量任务集中在单个调度中心集群节点。
+- 19、调度中心密码限制18位，修复修改密码超过18位无法登陆的问题；
 
 
 

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

 					<form class="form-horizontal form" role="form" >
 						<div class="form-group">
 							<label for="lastname" class="col-sm-2 control-label">${I18n.change_pwd_field_newpwd}<font color="red">*</font></label>
-							<div class="col-sm-10"><input type="text" class="form-control" name="password" placeholder="${I18n.system_please_input} ${I18n.change_pwd_field_newpwd}" maxlength="100" ></div>
+							<div class="col-sm-10"><input type="text" class="form-control" name="password" placeholder="${I18n.system_please_input} ${I18n.change_pwd_field_newpwd}" maxlength="18" ></div>
 						</div>
 						<hr>
 						<div class="form-group">

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