tasks #7411 Check duplicate

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

the display_time attribute is correctly duplicated on project creation

Change-Id: Ic0e54d19572fd99d871260583c9ac42ae0c04e83
Merge commit 'refs/changes/63/2963/1' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7411 Check duplicate

Change-Id: Icac2d6addcd824f857846b1b119fc6a9483261cc
This is Tuleap 7.4.99.17

Change-Id: I1a006348145cbe7646ea51f62c35d436a2c6353c