[Adaptive] QnAMakerRecognizer and OnQnAMatch

[chon219]

Close #1695

Description

Ported QnAMakerRecognizer and OnQnAMatch from botbuilder-dotnet.

Specific Changes

• Implemented QnAMakerRecognizer as one of recognizers
• Implemented OnQnAMatch as one of trigger conditions
• Refactored api of Recognizer class to follow the implementation in botbuilder-dotnet

Testing

All newly implemented components have tests covered.

[coveralls]

Pull Request Test Coverage Report for Build 122086

• 79 of 86 (91.86%) changed or added relevant lines in 18 files are covered.
• 9 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+9.5%) to 76.856%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
libraries/botbuilder-dialogs-adaptive/src/qnaMaker/qnaMakerRecognizer.ts	44	45	97.78%
libraries/botbuilder-dialogs-adaptive/src/input/oauthInput.ts	1	3	33.33%
libraries/botbuilder-dialogs-adaptive/src/conditions/onCondition.ts	1	5	20.0%

Files with Coverage Reduction	New Missed Lines	%
libraries/botframework-streaming/src/webSocket/webSocketTransport.ts	2	80.65%
libraries/botframework-streaming/src/webSocket/webSocketServer.ts	7	66.67%

Totals
Change from base Build 122082:	9.5%
Covered Lines:	11757
Relevant Lines:	14560

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💛 - Coveralls

[Stevenic]