fix smoke-test-plugins-ssl to work with ip6-localhost

Original commit: elastic/x-pack-elasticsearch@747714b0d1

elasticsearch/qa/smoke-test-plugins-ssl/build.gradle

@@ -18,6 +18,17 @@ task createKey(type: LoggedExec) {
     project.delete(keystore.parentFile)
     keystore.parentFile.mkdirs()
   }
+  String subjectAlternateNames = 'san=dns:localhost,ip:127.0.0.1'
+  // some machines have a different name for ipv6 loopback,
+  // at least on ubuntu its ip6-localhost
+  try {
+      String localhost6 = InetAddress.getByName("::1").getCanonicalHostName()
+      if (!localhost6.equals("localhost")) {
+          subjectAlternateNames += ",dns:" + localhost6
+      }
+  } catch (UnknownHostException ok) {
+      // e.g. no ipv6 support
+  }
   executable = 'keytool'
   standardInput = new ByteArrayInputStream('FirstName LastName\nUnit\nOrganization\nCity\nState\nNL\nyes\n\n'.getBytes('UTF-8'))
   args '-genkey',
@@ -26,7 +37,7 @@ task createKey(type: LoggedExec) {
        '-keyalg', 'RSA',
        '-keysize', '2048',
        '-validity', '712',
-       '-ext', 'san=dns:localhost,ip:127.0.0.1',
+       '-ext', subjectAlternateNames,
        '-storepass', 'keypass'
 }
 

elasticsearch/qa/smoke-test-watcher-with-groovy/src/test/java/org/elasticsearch/smoketest/WatcherRestTestCase.java

@@ -3,7 +3,7 @@
  * 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.watcher.test.rest;
+package org.elasticsearch.smoketest;
 
 import com.carrotsearch.randomizedtesting.annotations.Name;
 import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;

elasticsearch/qa/smoke-test-watcher-with-groovy/src/test/java/org/elasticsearch/smoketest/WatcherWithGroovyIT.java

@@ -3,7 +3,7 @@
  * 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.watcher.test.rest;
+package org.elasticsearch.smoketest;
 
 import org.elasticsearch.test.rest.RestTestCandidate;