Fixed new sites using "Default Product" Tier name

TryGhost/Product#1289

Since we added the free Tier fixture, this was attempting to fix the
free Tier, rather than the default one.

core/server/services/auth/setup.js

@@ -110,14 +110,15 @@ async function doProduct(data, productsAPI) {
         return user;
     }
     try {
-        const page = await productsAPI.browse({limit: 1});
+        const page = await productsAPI.browse({limit: 'all'});
+
+        const product = page.products.find(p => p.slug === 'default-product');
 
-        const [product] = page.products;
         if (!product) {
             return data;
         }
 
-        productsAPI.edit({products: [{name: blogTitle.trim()}]}, {context: context.context, id: product.id});
+        await productsAPI.edit({products: [{name: blogTitle.trim()}]}, {context: context.context, id: product.id});
     } catch (e) {
         return data;
     }

test/regression/api/admin/authentication.test.js

@@ -15,7 +15,8 @@ describe('Authentication API', function () {
             agent = await agentProvider.getAdminAPIAgent();
         });
 
-        beforeEach(function () {
+        beforeEach(async function () {
+            await mockManager.disableStripe();
             mockManager.mockMail();
         });
 
@@ -89,6 +90,13 @@ describe('Authentication API', function () {
                 .expect(({body}) => {
                     assert.deepEqual(body.notifications, [], 'The setup should not create notifications');
                 });
+
+            // Test that the default Tier has been renamed from 'Default Product'
+            const {body} = await agent.get('/tiers/');
+
+            const tierWithDefaultProductName = body.tiers.find(x => x.name === 'Default Product');
+
+            assert(tierWithDefaultProductName === undefined, 'The default Tier should have had a name change');
         });
 
         it('is setup? yes', async function () {