Spark features with dashboard are enabled (#3883)

* Spark features are enabled

* Fixed as PR comments

* minor change

* PR comments fixed

* minor fix

* change constant name to avoid conflicts with sqlopsextension

* sqlContext to context

* Changed tab name to SQL Server Big Data Cluster

* Added isCluster to ContextProvider to control display big data cluster dashboard tab
Ported New/open Notebook code to mssql extension and enable them in dashboard

* Fixed tslint

extensions/mssql/src/sparkFeature/historyTask.ts

@@ -0,0 +1,45 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as sqlops from 'sqlops';
+import * as vscode from 'vscode';
+import { AppContext } from '../appContext';
+import { getErrorMessage } from '../utils';
+import * as SqlClusterLookUp from '../sqlClusterLookUp';
+
+export class OpenSparkYarnHistoryTask {
+	constructor(private appContext: AppContext) {
+	}
+
+	async execute(sqlConnProfile: sqlops.IConnectionProfile, isSpark: boolean): Promise<void> {
+		try {
+			let sqlClusterConnection = SqlClusterLookUp.findSqlClusterConnection(sqlConnProfile, this.appContext);
+			if (!sqlClusterConnection)
+			{
+				let name = isSpark? 'Spark' : 'Yarn';
+				this.appContext.apiWrapper.showErrorMessage(`Please connect to the Spark cluster before View ${name} History.`);
+				return;
+			}
+			if (isSpark) {
+				vscode.commands.executeCommand('vscode.open', vscode.Uri.parse(this.generateSparkHistoryUrl(sqlClusterConnection.host, sqlClusterConnection.port)));
+			}
+			else {
+				vscode.commands.executeCommand('vscode.open', vscode.Uri.parse(this.generateYarnHistoryUrl(sqlClusterConnection.host, sqlClusterConnection.port)));
+			}
+		} catch (error) {
+			this.appContext.apiWrapper.showErrorMessage(getErrorMessage(error));
+		}
+	}
+
+	private generateSparkHistoryUrl(host: string, port: string): string {
+		return `https://${host}:${port}/gateway/default/sparkhistory/`;
+	}
+
+	private generateYarnHistoryUrl(host: string, port: string): string {
+		return `https://${host}:${port}/gateway/default/yarn/cluster/apps`;
+	}
+}