Remove references to service in base_issue_tracker_spec

spec/models/integrations/base_issue_tracker_spec.rb

@@ -7,26 +7,26 @@ RSpec.describe Integrations::BaseIssueTracker do
     let(:project) { create :project }
 
     describe 'only one issue tracker per project' do
-      let(:service) { Integrations::Redmine.new(project: project, active: true, issue_tracker_data: build(:issue_tracker_data)) }
+      let(:integration) { Integrations::Redmine.new(project: project, active: true, issue_tracker_data: build(:issue_tracker_data)) }
 
       before do
         create(:custom_issue_tracker_integration, project: project)
       end
 
-      context 'when service is changed manually by user' do
+      context 'when integration is changed manually by user' do
         it 'executes the validation' do
-          valid = service.valid?(:manual_change)
+          valid = integration.valid?(:manual_change)
 
           expect(valid).to be_falsey
-          expect(service.errors[:base]).to include(
+          expect(integration.errors[:base]).to include(
             'Another issue tracker is already in use. Only one issue tracker service can be active at a time'
           )
         end
       end
 
-      context 'when service is changed internally' do
+      context 'when integration is changed internally' do
         it 'does not execute the validation' do
-          expect(service.valid?).to be_truthy
+          expect(integration.valid?).to be_truthy
         end
       end
     end