Fix private task closure registration start/end date population issue

[Jaouad-Jaghrir]

Fix "Private task Closure in Direct should populate actual start and end time"
https://topcoder.atlassian.net/browse/SET-3

Issue Description:

1. Open https://www.topcoder-dev.com/direct/launch/home

2. Create a private task with the following parameters:
   2.1 - Challenge Type: First2Finish
   2.2 - Check the "Task" checkbox to make it private task
   2.3 - Assign the task to a member (Could not do this step in direct in dev environment, used Online Review for it)
   2.4 - Set the start date in the future
   2.5 - Follow the challenge creation wizard to the end to launch the challenge.

3. Once the challenge is launched, Go to the contest details page in direct.
   For example: https://www.topcoder-dev.com/direct/contest/detail?projectId=30056507

4. In the contest details page, close the private task and choose a winner by following steps shown on this screenshot:

5. Wait until Auto-Pilot handles the contest phases and open the contest in online review.
   For example: https://software.topcoder-dev.com/review/actions/ViewProjectDetails?method=viewProjectDetails&pid=30056507
   The result will be like shown on this screenshot:
   

After Fixing the issue:

Follow the same steps as above.
After closing the private task, the phases should be properly ordered in Online review, and actual start/end dates should be properly populated.
See screenshot: