fix itermittently failing conversations api spec
fix itermittently failing conversations api spec

Change-Id: I1e71350352db4eba09241c210e8391614eed1988
Reviewed-on: https://gerrit.instructure.com/21800
Reviewed-by: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Product-Review: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>
QA-Review: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>

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