filter params recursively in error reports

fixes CNVS-10607

test plan:
- specs should pass
- when an error does arrise on login (hard to reproduce), the user's password
  should be filtered in the corresponding error report.

Change-Id: I25145f38198599203d916cd90708a784152d5f2a
Reviewed-on: https://gerrit.instructure.com/29290
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: Amber Taniuchi <amber@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>