Add enrich qa module for rest tests and

move put policy api yaml test to this rest module.

The main benefit is that all tests will then be run when running:
`./gradlew -p x-pack/plugin/enrich check`

The rest qa module starts a node with default distribution and basic
license.

This qa module will also be used for adding different rest tests (not yaml),
for example rest tests needed for elastic#41532

Also when we are going to work on security integration then we can
add a security qa module under the qa folder. Also at some point
we should add a multi node qa module.

x-pack/plugin/enrich/build.gradle

@@ -22,3 +22,12 @@ run {
 
 // No tests yet:
 integTest.enabled = false
+
+// add all sub-projects of the qa sub-project
+gradle.projectsEvaluated {
+    project.subprojects
+            .find { it.path == project.path + ":qa" }
+            .subprojects
+            .findAll { it.path.startsWith(project.path + ":qa") }
+            .each { check.dependsOn it.check }
+}

x-pack/plugin/enrich/qa/build.gradle

@@ -0,0 +1,17 @@
+import org.elasticsearch.gradle.test.RestIntegTestTask
+
+apply plugin: 'elasticsearch.build'
+test.enabled = false
+
+dependencies {
+  compile project(':test:framework')
+}
+
+subprojects {
+  project.tasks.withType(RestIntegTestTask) {
+    final File xPackResources = new File(xpackProject('plugin').projectDir, 'src/test/resources')
+    project.copyRestSpec.from(xPackResources) {
+      include 'rest-api-spec/api/**'
+    }
+  }
+}

x-pack/plugin/enrich/qa/rest/build.gradle

@@ -0,0 +1,19 @@
+import org.elasticsearch.gradle.test.RestIntegTestTask
+
+apply plugin: 'elasticsearch.standalone-test'
+
+dependencies {
+    testCompile project(path: xpackModule('enrich'), configuration: 'runtime')
+}
+
+task restTest(type: RestIntegTestTask) {
+    mustRunAfter(precommit)
+}
+
+restTestCluster {
+    distribution 'default'
+    setting 'xpack.license.self_generated.type', 'basic'
+}
+
+check.dependsOn restTest
+test.enabled = false

x-pack/plugin/enrich/qa/rest/src/test/java/org/elasticsearch/xpack/enrich/EnrichRestIT.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.enrich;
+
+import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
+import org.elasticsearch.test.rest.yaml.ClientYamlTestCandidate;
+import org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase;
+
+public class EnrichRestIT extends ESClientYamlSuiteTestCase {
+
+    public EnrichRestIT(final ClientYamlTestCandidate testCandidate) {
+        super(testCandidate);
+    }
+
+    @ParametersFactory
+    public static Iterable<Object[]> parameters() throws Exception {
+        return ESClientYamlSuiteTestCase.createParameters();
+    }
+
+}