Fix date format error in Svenska GR/GY
Fix date format error in Svenska GR/GY

fixes MAT-729
flag=none

Test Plan:
 - Create and publish a course, including a
 student (this, in order to allow student
 to access the pages)
 - Create and publish a page, marking the
 'Add to student to-do' and specifying a
 valid date and time
 - Masquerade as the student and go to
 'Account > Settings'. Change the
 language to 'Svenska GR/GY' and save
 changes
 - Make sure you got translations enabled for
 your local Canvas. Refer to Confluence in case
 of questions
 - Access 'Pages' menu option as a student
 and you can see the change applied as well
 as in the table as in the general page
 overview

Change-Id: Ie778d75482d1aec2988f4990f4c729378238148e
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/289436
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Juan Chavez <8fc9c8a746010dcf1babfbe57a3b7ae7798e6eeb@instructure.com>
QA-Review: Juan Chavez <8fc9c8a746010dcf1babfbe57a3b7ae7798e6eeb@instructure.com>
Product-Review: David Lyons <c345b6495d82f574bde007a1165ad87fad2909cd@instructure.com>

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