some i18n fixes for rails 4

Change-Id: I8316a1377f4394b497ae0f95796db8b438b1d3fd
Reviewed-on: https://gerrit.instructure.com/42855
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Jensen <jon@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>