Move feature flag services to core

Part of moving feature flags to core

ee/spec/services/feature_flags/create_service_spec.rb → spec/services/feature_flags/create_service_spec.rb

@@ -63,7 +63,7 @@ RSpec.describe FeatureFlags::CreateService do
                            'with strategies <strong>[{"name"=>"default", "parameters"=>{}}]</strong>.'
 
         expect { subject }.to change { AuditEvent.count }.by(1)
-        expect(AuditEvent.last.present.action).to eq(expected_message)
+        expect(AuditEvent.last.details[:custom_message]).to eq(expected_message)
       end
 
       context 'when user is reporter' do

ee/spec/services/feature_flags/destroy_service_spec.rb → spec/services/feature_flags/destroy_service_spec.rb

@@ -19,7 +19,7 @@ RSpec.describe FeatureFlags::DestroyService do
   describe '#execute' do
     subject { described_class.new(project, user, params).execute(feature_flag) }
 
-    let(:audit_event_message) { AuditEvent.last.present.action }
+    let(:audit_event_message) { AuditEvent.last.details[:custom_message] }
     let(:params) { {} }
 
     it 'returns status success' do

ee/spec/services/feature_flags/update_service_spec.rb → spec/services/feature_flags/update_service_spec.rb

@@ -19,7 +19,7 @@ RSpec.describe FeatureFlags::UpdateService do
 
     let(:params) { { name: 'new_name' } }
     let(:audit_event_message) do
-      AuditEvent.last.present.action
+      AuditEvent.last.details[:custom_message]
     end
 
     it 'returns success status' do