tweak region scope

refs CNVS-15955

add a scope for specifying the region

Change-Id: I9709e2d47c241115ed9a868ba1660d34e92f126b
Reviewed-on: https://gerrit.instructure.com/42101
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Rob Orton <rob@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>