Fix displaying specific error message when Jenkins test fails

app/assets/javascripts/integrations/integration_settings_form.js

@@ -102,7 +102,7 @@ export default class IntegrationSettingsForm {
     })
     .done((res) => {
       if (res.error) {
-        new Flash(res.message, null, null, {
+        new Flash(`${res.message} ${res.service_response}`, null, null, {
           title: 'Save anyway',
           clickHandler: (e) => {
             e.preventDefault();

spec/javascripts/integrations/integration_settings_form_spec.js

@@ -135,10 +135,10 @@ describe('IntegrationSettingsForm', () => {
 
       integrationSettingsForm.testSettings(formData);
 
-      deferred.resolve({ error: true, message: errorMessage });
+      deferred.resolve({ error: true, message: errorMessage, service_response: 'some error' });
 
       const $flashContainer = $('.flash-container');
-      expect($flashContainer.find('.flash-text').text()).toEqual(errorMessage);
+      expect($flashContainer.find('.flash-text').text()).toEqual('Test failed. some error');
       expect($flashContainer.find('.flash-action')).toBeDefined();
       expect($flashContainer.find('.flash-action').text()).toEqual('Save anyway');
     });