[代码完善](v2.5): v2.5 beta update EmailServiceImpl.java

close https://github.com/elunez/eladmin/issues/391

close #391

eladmin-tools/src/main/java/me/zhengjie/service/impl/EmailServiceImpl.java

@@ -69,6 +69,7 @@ public class EmailServiceImpl implements EmailService {
         }
         // 封装
         MailAccount account = new MailAccount();
+        account.setUser(emailConfig.getUser());
         account.setHost(emailConfig.getHost());
         account.setPort(Integer.parseInt(emailConfig.getPort()));
         account.setAuth(true);