change settings.value to text

refs OPS-92

test plan: n/a

Change-Id: Iae1fa2eb2194c0d9ea5c9a1e29a6ffabb0e90a92
Reviewed-on: https://gerrit.instructure.com/34611
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Nick Cloward <ncloward@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
Product-Review: Brian Palmer <brianp@instructure.com>
QA-Review: Brian Palmer <brianp@instructure.com>