Extension tests improperly activate instance from dist folder

<!-- Please search existing issues to avoid creating duplicates. --> <!-- Also please test using the latest insiders build to make sure your issue has not already been fixed: https://code.visualstudio.com/insiders/ --> I have come across an issue with an extension I am working on where the extension tests seem to be launching my webpacked extension from `dist` which causes intermittent failures due to commands being registered twice in classes that are supposed to be singletons among other things. This has started happening after changing activation events to the following: ` "activationEvents": [ "*" ]` (e.g., activating my extension on startup of VSCode). If the `dist` folder **does not** exist, then my tests work as expected but produce a stacktrace similar to: ``` Activating extension `vscode-samples.webpack-sample` failed: Cannot find module '/Users/minardi/vscode-extension-samples/webpack-sample/dist/extension' Require stack: - /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/loader.js - /Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-amd.js - /Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-fork.js Here is the error stack: Error: Cannot find module '/Users/minardi/vscode-extension-samples/webpack-sample/dist/extension' Require stack: - /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/loader.js - /Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-amd.js - /Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-fork.js at Function._resolveFilename (internal/modules/cjs/loader.js:627:15) at Function.<anonymous> (internal/modules/cjs/loader.js:531:27) at Function.<anonymous> (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:796:852) at Function.<anonymous> (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions…