add norwegian or nb translation

closes CNVS-14012

test plan
 - change your user settings to Norwegian (Bokmål)
   and verify that the new translations appear properly 

Change-Id: I4adf61a6d39f2ef05bb7fe2e66f76b2325cfa004
Reviewed-on: https://gerrit.instructure.com/37386
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Product-Review: Rob Orton <rob@instructure.com>