tasks #7410 Check masschange

This task is part of story #7161 Create a date-time field

The masschange form uses the new date picker, time displayed date are taken in account

Change-Id: Ia1667ad548b568fb7529a6397c762ea7ac0fc688
Merge commit 'refs/changes/67/2967/1' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7410 Check masschange

Change-Id: I5dbd3ea529df7c8f97da052efcdef6b084824391
This is Tuleap 7.4.99.19

Change-Id: Iaa1b06cbbd483ae767516cce39dddc9eb2b06b27