fix i18n for time zone dropdowns and profiles

fixes CAT-465

Test Plan
  1. Start canvas with full localization support enabled
     (ie $ LOLCALIZE=true rails server)
  2. Ensure the time zone select inputs on the course settings,
     account settings, user profile settings and new user confirmation
     pages are localized appropriately
  3. Ensure the course and user profile time zone is localized
     when not editing the settings

Change-Id: Ic9cb64986451a9a10925b716b727eae45b3b1806
Reviewed-on: https://gerrit.instructure.com/39435
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Nick Houle <nhoule@instructure.com>
QA-Review: Adam Phillipps <adam@instructure.com>
Product-Review: Adam Phillipps <adam@instructure.com>