Test grace auth against gitlab_ci_project with token

spec/lib/gitlab/backend/grack_auth_spec.rb

@@ -175,11 +175,14 @@ describe Grack::Auth do
         context "when a gitlab ci token is provided" do
           let(:token) { "123" }
+          let(:gitlab_ci_project) { FactoryGirl.create :ci_project, token: token }
           before do
+            project.gitlab_ci_project = gitlab_ci_project
+            project.save
+
             gitlab_ci_service = project.build_gitlab_ci_service
             gitlab_ci_service.active = true
-            allow(gitlab_ci_service).to receive(:token).and_return(token)
             gitlab_ci_service.save
             env["HTTP_AUTHORIZATION"] = ActionController::HttpAuthentication::Basic.encode_credentials("gitlab-ci-token", token)