[AutoPR mgmt-v2016_10_01] Update keyvault.json#6784

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openapi-sdkautomation[bot] wants to merge 1 commit intomasterfrom sdkAuto/11040/mgmt-v2016_10_01

+220-198

Commits on Dec 3, 2020

CodeGen from PR 11040 in Azure/azure-rest-api-specs
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