Fix ConditionalRelease::Service rules_cache caching nil
Fix ConditionalRelease::Service rules_cache caching nil

Change-Id: Ib656a703867af79554e459a04bf4f0cba75f7fba
Reviewed-on: https://gerrit.instructure.com/90027
Tested-by: Jenkins
Reviewed-by: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>
Product-Review: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>
QA-Review: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>

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