Update sample 21 to align with core bot

[garypretty]

Fixes #2203

• Aligns core bot to core bot sample
• Adds telemetry client to LUIS recognizer to align with C# example

[WashingtonKayaker]

Need to add the WebSocket code to the end of Index.js (See PR 2065 and PR 2086):

// Listen for Upgrade requests for Streaming.
server.on('upgrade', (req, socket, head) => {
    // Create an adapter scoped to this WebSocket connection to allow storing session data.
    const streamingAdapter = new BotFrameworkAdapter({
        appId: process.env.MicrosoftAppId,
        appPassword: process.env.MicrosoftAppPassword
    });
    // Set onTurnError for the BotFrameworkAdapter created for each connection.
    streamingAdapter.onTurnError = onTurnErrorHandler;

    streamingAdapter.useWebSocket(req, socket, head, async (context) => {
        // After connecting via WebSocket, run this logic for every request sent over
        // the WebSocket connection.
        await bot.run(context);
    });
});

[WashingtonKayaker]

Minor issue on line 65 of Index.js, the second parameter for TelemetryInitializerMiddleware defaults to true, so does not need to be set, and isn't set in the C# version (which is a bit of a different case due to DI, so parity may not be as important here).

[garypretty]

Minor issue on line 65 of Index.js, the second parameter for TelemetryInitializerMiddleware defaults to true, so does not need to be set, and isn't set in the C# version (which is a bit of a different case due to DI, so parity may not be as important here).

@WashingtonKayaker I have removed the second param and also made the other amends you requested. Thanks for the review.

[WashingtonKayaker]

Need to remove the local from the URL links.