Add QualityForRecognition to Face Detection

[msyache]

Added the optional attribute QualityForRecognition to Face Detection API.
Also includes some document discrepancy bugfixes.
Related swagger change PR:
Azure/azure-rest-api-specs#14556
Azure/azure-rest-api-specs#15187
Azure/azure-rest-api-specs#16449
Azure/azure-rest-api-specs#16846

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[dipidoo]

There are some reordered parameters of same type (string) that may be confusing for people who upgrades

Comments addressed, but we can't find where to resolve the changes requested block