[#6588] UserId not being passed to AzureDiagnostics

[sw-joelmut]

Fixes microsoft/botframework-sdk#6588

Description

This PR fixes an issue where the userId property was empty when displaying the AzureDiagnostics table in the Log Analytics workspace resource.

Specific Changes

• Added userId property to the query-knowledgebases request in the LanguageServiceUtils file.
• Added unit test in the LanguageServiceTests file to validate when the userId property is empty.
• Updated failing tests in the LanguageServiceTests file.

Testing

The following images show the unit tests passing and the AzureDiagnostics logs from the Language service resource.

[coveralls]

Pull Request Test Coverage Report for Build 349477

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.004%) to 79.097%

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Files with Coverage Reduction	New Missed Lines	%
/libraries/Microsoft.Bot.Builder.AI.QnA/Utils/LanguageServiceUtils.cs	3	83.12%

Totals
Change from base Build 349053:	0.004%
Covered Lines:	25829
Relevant Lines:	32655

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💛 - Coveralls

[BruceHaley]

✔️ No Binary Compatibility issues for Microsoft.Bot.Builder.AI.QnA.dll