integration specs are request specs in rspec2

Change-Id: Iffee4243a9fa27e43f7020919a18777031e9724f
Reviewed-on: https://gerrit.instructure.com/28833
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Brian Palmer <brianp@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>