fix semantic merge conflict in cache store spec

Change-Id: Ia53c80885bf80ccbf0714b6a5412e27792e8493a
Reviewed-on: https://gerrit.instructure.com/40039
Reviewed-by: Brian Palmer <brianp@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>