fix a broken route due to rails4

refs  CNVS-15128

test plan:
1. add an email address to a user's profile
2. click the 'Re-Send Confirmation' link
2. verify the request completes successfully

Change-Id: I0e5bafffb0d0a967c3dec5a53bccba9bf4f39425
Reviewed-on: https://gerrit.instructure.com/42340
Reviewed-by: Cody Cutrer <cody@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Product-Review: August Thornton <august@instructure.com>