Members::RequestAccessService is tricter on permissions

Fortunately, only specs needed to be fixed, so that's good!
Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/finders/access_requests_finder_spec.rb

@@ -3,8 +3,8 @@ require 'spec_helper'
 describe AccessRequestsFinder, services: true do
   let(:user) { create(:user) }
   let(:access_requester) { create(:user) }
-  let(:project) { create(:project) }
-  let(:group) { create(:group) }
+  let(:project) { create(:project, :public) }
+  let(:group) { create(:group, :public) }
 
   before do
     project.request_access(access_requester)

spec/models/member_spec.rb

@@ -174,7 +174,7 @@ describe Member, models: true do
   describe '.add_user' do
     %w[project group].each do |source_type|
       context "when source is a #{source_type}" do
-        let!(:source) { create(source_type) }
+        let!(:source) { create(source_type, :public) }
         let!(:user) { create(:user) }
         let!(:admin) { create(:admin) }