Merged PR 421683: add require logPath for extension context

add require logPath for extension context

test/stub.ts

@@ -18,6 +18,7 @@ class TestExtensionContext implements vscode.ExtensionContext {
   globalState: vscode.Memento = new DummyMemento();
   extensionPath = '';
   storagePath = '';
+  logPath = '';
 
   asAbsolutePath(relativePath: string): string {
     return '';