[INTERNAL] Test fixtures: Adopt to required namespaces

Tests are failing due to SAP/ui5-builder#430

 Adopt tests fixture to provide necessary manifest.json file.

Author: RandomByte

test/fixtures/application.a/webapp/manifest.json

@@ -0,0 +1,13 @@
+{
+    "_version": "1.1.0",
+    "sap.app": {
+        "_version": "1.1.0",
+        "id": "id1",
+        "type": "application",
+        "applicationVersion": {
+            "version": "1.2.2"
+        },
+        "embeds": ["embedded"],
+        "title": "{{title}}"
+    }
+}

test/lib/server/main.js

@@ -570,7 +570,7 @@ test("Get index of resources", (t) => {
 			t.deepEqual(res.statusCode, 200, "Correct HTTP status code");
 			t.is(res.headers["content-type"], "text/html; charset=utf-8", "Correct content type");
 			t.is(/<title>(.*)<\/title>/i.exec(res.text)[1], "Index of /", "Found correct title");
-			t.deepEqual(res.text.match(/<li/g).length, 8, "Found correct amount of <li> elements");
+			t.deepEqual(res.text.match(/<li/g).length, 9, "Found correct amount of <li> elements");
 		}),
 		request.get("/resources").then((res) => {
 			t.deepEqual(res.statusCode, 200, "Correct HTTP status code");