Added labels test for empty browse response

- Added a simple test to prove the response is in the correct format when there is no results

test/e2e-api/admin/__snapshots__/labels.test.js.snap

@@ -66,6 +66,34 @@ Object {
 }
 `;
 
+exports[`Labels API Can browse with no labels 1: [body] 1`] = `
+Object {
+  "labels": Array [],
+  "meta": Object {
+    "pagination": Object {
+      "limit": 15,
+      "next": null,
+      "page": 1,
+      "pages": 1,
+      "prev": null,
+      "total": 0,
+    },
+  },
+}
+`;
+
+exports[`Labels API Can browse with no labels 2: [headers] 1`] = `
+Object {
+  "access-control-allow-origin": "http://127.0.0.1:2369",
+  "cache-control": "no-cache, private, no-store, must-revalidate, max-stale=0, post-check=0, pre-check=0",
+  "content-length": "101",
+  "content-type": "application/json; charset=utf-8",
+  "etag": StringMatching /\\(\\?:W\\\\/\\)\\?"\\(\\?:\\[ !#-\\\\x7E\\\\x80-\\\\xFF\\]\\*\\|\\\\r\\\\n\\[\\\\t \\]\\|\\\\\\\\\\.\\)\\*"/,
+  "vary": "Origin, Accept-Encoding",
+  "x-powered-by": "Express",
+}
+`;
+
 exports[`Labels API Can destroy 1: [body] 1`] = `
 Object {
   "labels": Array [

test/e2e-api/admin/labels.test.js

@@ -16,6 +16,16 @@ describe('Labels API', function () {
         await agent.loginAsOwner();
     });
 
+    it('Can browse with no labels', async function () {
+        await agent
+            .get('labels')
+            .expectStatus(200)
+            .matchBodySnapshot()
+            .matchHeaderSnapshot({
+                etag: anyEtag
+            });
+    });
+
     it('Can add', async function () {
         await agent
             .post('labels')