add translations to SIS Import plugin

fixes SIS-627

Test Plan:
- To allow Canvas to be translated you must start canvas with
  these options:
-- RAILS_LOAD_ALL_LOCALES=true USE_OPTIMIZED_JS=true rails s

- Confirm all translations in these screenshots are translated
-- http://screencast.com/t/DUuU85s0
-- http://screencast.com/t/HDawR9681i
-- http://screencast.com/t/QOVas4gfd

NOTE:
- If you're using the LOLCALIZE=true option to test translations
  months, days, etc. will not be translated by LOLCALIZE but will be
  translated in another language.
- If you're using Spanish or French as the language be aware that
  some of the short hand months are the same as english becasue
  they are related closely to english.

Change-Id: Ia14a3ec4408f40c9bcdd309c7088c5165519a1f9
Reviewed-on: https://gerrit.instructure.com/43983
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jayce Higgins <jhiggins@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Product-Review: Nick Houle <nhoule@instructure.com>