Title: Lesson index tests

To test MDL-62761 issue

Section 1
  Announcements
  No open date or deadline
  Open in the past (01 Jan 2018) deadline in the future (31 dec 2018)
Extra lessons for extra testing
  Open date in the future (31 Dec 2018). No deadline
  No open date. Deadline in the future (31 Dec 2018)
  Open date in the past (1 Jan 2018). No deadline
  No Open date. Deadline in the past (31 Jan 2018)
  Open date in the past (1 Jan 2018). Deadline in the past (31 Jan 2018)
  No open date. Deadline in the future (31 Dec 2018)
Section 3
Section 4
Section 5