test: Consistently clean up folder before stopping server

There seems to be some integration tests that sometimes fail
on tests where the order is reversed.
Hopefully this resolves the problem.

test/integration/ResourceLockCleanup.test.ts

@@ -53,11 +53,8 @@ void => {
   });
 
   afterAll(async(): Promise<void> => {
-    // Stop the server
-    await app.stop();
-
-    // Execute the configured teardown
     await teardown();
+    await app.stop();
   });
 
   it('should not be affected by dangling locks.', async(): Promise<void> => {