Testclusters: graph (#43033)

Convert x-pack  graph to use testClusters

x-pack/plugin/graph/qa/with-security/build.gradle

@@ -1,3 +1,4 @@
+apply plugin: 'elasticsearch.testclusters'
 apply plugin: 'elasticsearch.standalone-rest-test'
 apply plugin: 'elasticsearch.rest-test'
 
@@ -12,25 +13,15 @@ task copyGraphRestTests(type: Copy) {
   include 'rest-api-spec/test/graph/**'
 }
 
-integTestCluster {
-  dependsOn copyGraphRestTests
-  extraConfigFile 'roles.yml', 'roles.yml'
-  setupCommand 'setupTestAdminUser',
-               'bin/elasticsearch-users', 'useradd', 'test_admin', '-p', 'x-pack-test-password', '-r', 'superuser'
-  setupCommand 'setupGraphExplorerUser',
-               'bin/elasticsearch-users', 'useradd', 'graph_explorer', '-p', 'x-pack-test-password', '-r', 'graph_explorer'
-  setupCommand 'setupPowerlessUser',
-               'bin/elasticsearch-users', 'useradd', 'no_graph_explorer', '-p', 'x-pack-test-password', '-r', 'no_graph_explorer'
-  setting 'xpack.license.self_generated.type', 'trial'
+integTest.dependsOn copyGraphRestTests
+
+testClusters.integTest {
+  distribution = "DEFAULT"
   setting 'xpack.security.enabled', 'true'
-  waitCondition = { node, ant ->
-    File tmpFile = new File(node.cwd, 'wait.success')
-    ant.get(src: "http://${node.httpUri()}/_cluster/health?wait_for_nodes=>=${numNodes}&wait_for_status=yellow",
-            dest: tmpFile.toString(),
-            username: 'test_admin',
-            password: 'x-pack-test-password',
-            ignoreerrors: true,
-            retries: 10)
-    return tmpFile.exists()
-  }
+  setting 'xpack.license.self_generated.type', 'trial'
+
+  extraConfigFile 'roles.yml', file('roles.yml')
+  user username: 'test_admin', password: 'x-pack-test-password'
+  user username: 'graph_explorer', password: 'x-pack-test-password', role: 'graph_explorer'
+  user username: 'no_graph_explorer', password: 'x-pack-test-password', role: 'no_graph_explorer'
 }