Add file header

Author: JoeRobich

test/integrationTests/sourceGeneratorDefinitionProvider.test.ts

@@ -1,3 +1,8 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
 import { expect, should } from "chai";
 import * as vscode from "vscode";
 import * as path from 'path';