Test: make sure index `test` exists

Original commit: elastic/x-pack-elasticsearch@4c4b7af85d

src/test/java/org/elasticsearch/watcher/test/integration/HttpInputIntegrationTest.java

@@ -52,6 +52,7 @@ public class HttpInputIntegrationTest extends AbstractWatcherIntegrationTests {
     @Test
     public void testHttpInput() throws Exception {
         ScriptServiceProxy sc = scriptService();
+        createIndex("index");
         client().prepareIndex("index", "type", "id").setSource("{}").setRefresh(true).get();
 
         InetSocketAddress address = internalTestCluster().httpAddresses()[0];