spec: add discussion author check after user merge
spec: add discussion author check after user merge

Change-Id: Ida0a2f8820b86951cca811fc6feee3e8da70a514
Reviewed-on: https://gerrit.instructure.com/71324
Tested-by: Jenkins
Reviewed-by: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>
Product-Review: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>
QA-Review: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>

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