spec: don't override base_transactions in onceler noop

Change-Id: I195885e7f56bdfc8c10f454f6660261854a2277d
Reviewed-on: https://gerrit.instructure.com/37970
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>
QA-Review: James Williams  <jamesw@instructure.com>