Add project to jupyter cluster app factory

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

spec/factories/clusters/applications/helm.rb

@@ -59,7 +59,7 @@ FactoryBot.define do
 
     factory :clusters_applications_jupyter, class: Clusters::Applications::Jupyter do
       oauth_application factory: :oauth_application
-      cluster factory: %i(cluster with_installed_helm provided_by_gcp)
+      cluster factory: %i(cluster with_installed_helm provided_by_gcp project)
     end
   end
 end

spec/models/clusters/applications/jupyter_spec.rb

@@ -114,11 +114,7 @@ describe Clusters::Applications::Jupyter do
     end
 
     context 'when cluster belongs to a project' do
-      let(:project) { create(:project) }
-
-      before do
-        application.cluster.projects << project
-      end
+      let(:project) { application.cluster.first_project }
 
       it 'sets GitLab project id' do
         expect(values).to match(/GITLAB_PROJECT_ID: '?#{project.id}/)