(#279) Fix resource path

Author: s1hofmann

e2e/plugin-test/index.spec.ts renamed to e2e/plugin-test/index.e2e.spec.ts

@@ -55,7 +55,7 @@ describe("E2E tests", () => {
   });
 
   it("should perform some calculations", async () => {
-    screen.config.resourceDirectory = "../assets";
+    screen.config.resourceDirectory = "./e2e/assets";
     await assert.isVisible("mouse.png");
     await assert.isVisible("desktop.png");
     await openXfceMenu();