add FE get suppliers stub

test/javascripts/acceptance/admin-submissions-test.js

@@ -34,6 +34,9 @@ acceptance("Admin | Submissions", function (needs) {
     server.get("/admin/wizards/wizard", () => {
       return helper.response(getWizard);
     });
+    server.get("/admin/plugins/subscription-client/suppliers", () => {
+      return helper.response(getSuppliers);
+    });
   });
   test("View submissions fields tab and content", async (assert) => {
     await visit("/admin/wizards/submissions");

test/javascripts/helpers/admin-wizard.js

@@ -914,6 +914,15 @@ const putNewApi = {
     log: [],
   },
 };
+const getSuppliers = {
+  "suppliers": [
+    { "id": 1,
+    "name": "Pavilion",
+    "authorized": false,
+    "authorized_at": null,
+    "user": null }
+  ]
+};
 export {
   getWizard,
   getUnsubscribedAdminWizards,
@@ -928,4 +937,5 @@ export {
   putNewApi,
   getAnotherWizardSubmission,
   getUniqueWizard,
+  getSuppliers,
 };