bump authlogic for official rails4 support

Change-Id: I41bb4316c2336496194a994cc1cc62b2a5c94787
Reviewed-on: https://gerrit.instructure.com/42325
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Paul Hinze <paulh@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>