i18n Course Activity date fields
i18n Course Activity date fields

fixes: CNVS-11070

Fixes path to the type of date format that needs to be used.  It now uses an
absolute path vs a relative path.

Test Plan:
  - Create a course and update the start at and concluded at
  - Open course activity logs and make sure the dates are in the correct format
    2014-02-10T22:02:42Z 2014-02-10T22:02:42Z should show as Feb 10, 2014 3:02pm

Change-Id: I32f3825254bfcffcceeaa84399b3a89e4bfc75e8
Reviewed-on: https://gerrit.instructure.com/29910
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: Nick Cloward <9cc571ed222c7ca8c35f018ff48a612f8cadeb73@instructure.com>

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