[IMP] hr_attendance: remove extra rpc

The attendance module needs to know if the user is an employee before
putting itself in the systray.  This commit add the information in the
session infos, and use it directly.

addons/hr_attendance/__init__.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-import hr_attendance
 import wizard
 import report
+import models

addons/hr_attendance/models/__init__.py

@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+
+import hr_attendance
+import ir_http

addons/hr_attendance/models/ir_http.py

@@ -0,0 +1,9 @@
+from openerp import models, service
+
+class Http(models.Model):
+    _inherit = 'ir.http'
+
+    def session_info(self):
+        result = super(Http, self).session_info()
+        result['is_employee'] = self.env.user.has_group('base.group_user')
+        return result

addons/hr_attendance/static/src/js/attendance.js

@@ -4,7 +4,7 @@ odoo.define('hr_attendance.hr_attendance', function(require) {
 var core = require('web.core');
 var data = require('web.data');
 var formats = require('web.formats');
-var Model = require('web.DataModel');
+var session = require('web.session');
 var SystrayMenu = require('web.SystrayMenu');
 var time = require('web.time');
 var Widget = require('web.Widget');
@@ -75,10 +75,9 @@ var AttendanceSlider = Widget.extend({
     },
 });
 
-// Put the AttendanceSlider widget in the systray menu if the user is an employee
-var Users = new Model('res.users');
-Users.call('has_group', ['base.group_user']).done(function(is_employee) {
-    if (is_employee) {
+session.is_bound.then(function () {
+    // Put the AttendanceSlider widget in the systray menu if the user is an employee
+    if (session.is_employee) {
         SystrayMenu.Items.push(AttendanceSlider);
     }
 });