[SecuritySolution] [8.11] Fix fleet_integration.ts API integration te…

…st flake (elastic#170510)

Fixes: elastic#167056

**See
[comment](elastic#167056 (comment))
in ticket.**
**This is only the fix for 8.11.**

## Summary

- Changes the installation of the `security_detection_engine` package
from the current Fleet bulk install packages endpoint to use the
endpoint that installs a single package, in order to get to a more
stable test
- Notice that the errors reported that Kibana machine are socket
hangups/timeouts and are solved on retry, so they do not block any
pipelines)

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

x-pack/test/detection_engine_api_integration/security_and_spaces/prebuilt_rules/fleet_integration.ts

@@ -12,7 +12,7 @@ import {
   getPrebuiltRulesAndTimelinesStatus,
 } from '../../utils';
 import { deleteAllPrebuiltRuleAssets } from '../../utils/prebuilt_rules/delete_all_prebuilt_rule_assets';
-import { installPrebuiltRulesFleetPackage } from '../../utils/prebuilt_rules/install_prebuilt_rules_fleet_package';
+import { installPrebuiltRulesPackageViaFleetAPI } from '../../utils/prebuilt_rules/install_fleet_package_by_url';
 import { installPrebuiltRulesAndTimelines } from '../../utils/prebuilt_rules/install_prebuilt_rules_and_timelines';
 import { deletePrebuiltRulesFleetPackage } from '../../utils/prebuilt_rules/delete_prebuilt_rules_fleet_package';
 
@@ -41,11 +41,7 @@ export default ({ getService }: FtrProviderContext): void => {
       expect(statusBeforePackageInstallation.rules_not_installed).toBe(0);
       expect(statusBeforePackageInstallation.rules_not_updated).toBe(0);
 
-      await installPrebuiltRulesFleetPackage({
-        es,
-        supertest,
-        overrideExistingPackage: true,
-      });
+      await installPrebuiltRulesPackageViaFleetAPI(es, supertest);
 
       // Verify that status is updated after package installation
       const statusAfterPackageInstallation = await getPrebuiltRulesAndTimelinesStatus(supertest);

x-pack/test/detection_engine_api_integration/utils/index.ts

@@ -112,3 +112,4 @@ export * from './prebuilt_rules/install_prebuilt_rules';
 export * from './prebuilt_rules/upgrade_prebuilt_rules';
 export * from './prebuilt_rules/install_mock_prebuilt_rules';
 export * from './prebuilt_rules/install_prebuilt_rules_and_timelines';
+export * from './prebuilt_rules/get_prebuilt_rules_and_timelines_status';

x-pack/test/detection_engine_api_integration/utils/prebuilt_rules/install_fleet_package_by_url.ts

@@ -10,21 +10,20 @@ import { ALL_SAVED_OBJECT_INDICES } from '@kbn/core-saved-objects-server';
 import { InstallPackageResponse } from '@kbn/fleet-plugin/common/types';
 
 /**
- * Installs prebuilt rules package `security_detection_engine` by version.
+ * Installs latest available non-prerelease prebuilt rules package `security_detection_engine`.
  *
  * @param es Elasticsearch client
  * @param supertest SuperTest instance
  * @param version Semver version of the `security_detection_engine` package to install
  * @returns Fleet install package response
  */
 
-export const installPrebuiltRulesPackageByVersion = async (
+export const installPrebuiltRulesPackageViaFleetAPI = async (
   es: Client,
-  supertest: SuperTest.SuperTest<SuperTest.Test>,
-  version: string
+  supertest: SuperTest.SuperTest<SuperTest.Test>
 ): Promise<InstallPackageResponse> => {
   const fleetResponse = await supertest
-    .post(`/api/fleet/epm/packages/security_detection_engine/${version}`)
+    .post(`/api/fleet/epm/packages/security_detection_engine`)
     .set('kbn-xsrf', 'xxxx')
     .type('application/json')
     .send({ force: true })
@@ -48,3 +47,29 @@ export const installPrebuiltRulesPackageByVersion = async (
 
   return fleetResponse.body as InstallPackageResponse;
 };
+/**
+ * Installs prebuilt rules package `security_detection_engine`, passing in the version
+ * of the package as a parameter to the utl.
+ *
+ * @param es Elasticsearch client
+ * @param supertest SuperTest instance
+ * @param version Semver version of the `security_detection_engine` package to install
+ * @returns Fleet install package response
+ */
+
+export const installPrebuiltRulesPackageByVersion = async (
+  es: Client,
+  supertest: SuperTest.SuperTest<SuperTest.Test>,
+  version: string
+): Promise<InstallPackageResponse> => {
+  const fleetResponse = await supertest
+    .post(`/api/fleet/epm/packages/security_detection_engine/${version}`)
+    .set('kbn-xsrf', 'xxxx')
+    .type('application/json')
+    .send({ force: true })
+    .expect(200);
+
+  await es.indices.refresh({ index: ALL_SAVED_OBJECT_INDICES });
+
+  return fleetResponse.body as InstallPackageResponse;
+};