ACL error on Project Issues

There is a missing ACL on `resource.calendar.attendance` that causes an ACL error when calculating issue statistics for working hours.

To reproduce:

  - Login ad admin
  - In Settings / Configuration / Project: activate the "Manage time estimation on tasks "
  - In the "Website Design Templates" project settings, "Other Info" tab, set the Working Time to "45 Hours/Week"
  - Create a new user with group "Project User"
  - Login as the new user and view the Issues of the "Website Design Templates" project. 

An error will be raised:

    AccessError
    No value found for resource.calendar(1,).attendance_ids