fix authentication_audits_api_spec for rails 3

options is never defined, and it only happens to work in rails 2
cause it's an internal method of rspec 1 that returns an empty hash

Change-Id: Ifa43d54bd8739188f61dbf9ce0ffd7e4ef782719
Reviewed-on: https://gerrit.instructure.com/30167
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Derek DeVries <ddevries@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>