Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Upgrade testcontainers to 1.13.0
  ElasticContainer: Upgrade V7_6 to elasticsearch 7.6.1
  Update jetty to 9.4.24.v20191120

Change-Id: I3026e9fc709d03b232424ca8dd203c2528000f08
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java b/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
index 98d723f..96041a1 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
@@ -67,7 +67,7 @@
       case V7_5:
         return "blacktop/elasticsearch:7.5.2";
       case V7_6:
-        return "blacktop/elasticsearch:7.6.0";
+        return "blacktop/elasticsearch:7.6.1";
     }
     throw new IllegalStateException("No tests for version: " + version.name());
   }