Avoid setting profile name to not found (#8357)

* avoid setting profile name to not found

* only set profile name when empty

* profile.name is required

* set profile name before validation

* fix and add tests

test/api/v3/integration/user/auth/POST-register_local.test.js

@@ -32,6 +32,7 @@ describe('POST /user/auth/local/register', () => {
       expect(user._id).to.exist;
       expect(user.apiToken).to.exist;
       expect(user.auth.local.username).to.eql(username);
+      expect(user.profile.name).to.eql(username);
     });
 
     it('provides default tags and tasks', async () => {