[AutoPR cognitiveservices/data-plane/QnAMaker] Adding API For QnAMaker v4.0#2558

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AutorestCI merged 4 commits intorestapi_auto_cognitiveservices/data-plane/QnAMakerfrom

restapi_auto_4377

Nov 19, 2018

Commits on Nov 2, 2018

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Commits on Nov 16, 2018

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