Test for missing `enable_ssl_verification` field

spec/requests/api/system_hooks_spec.rb

@@ -37,11 +37,13 @@ RSpec.describe API::SystemHooks do
         expect(response).to have_gitlab_http_status(:ok)
         expect(response).to include_pagination_headers
         expect(json_response).to be_an Array
+        expect(json_response.first).not_to have_key("token")
         expect(json_response.first['url']).to eq(hook.url)
         expect(json_response.first['push_events']).to be false
         expect(json_response.first['tag_push_events']).to be false
         expect(json_response.first['merge_requests_events']).to be false
         expect(json_response.first['repository_update_events']).to be true
+        expect(json_response.first['enable_ssl_verification']).to be true
       end
     end
   end