Fix specs for environment terminals and rollout status

spec/models/environment_spec.rb

@@ -407,7 +407,7 @@ describe Environment do
 
       shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
         it 'returns the terminals from the deployment service' do
-          expect(project.deployment_platform(environment: environment))
+          expect(environment.deployment_platform)
             .to receive(:terminals).with(environment)
             .and_return(:fake_terminals)
 
@@ -448,7 +448,7 @@ describe Environment do
         end
 
         it 'returns the rollout status from the deployment service' do
-          expect(project.deployment_platform(environment: environment))
+          expect(environment.deployment_platform)
             .to receive(:rollout_status).with(environment)
             .and_return(:fake_rollout_status)