Merge branch 'stable-3.2' into stable-3.3

* stable-3.2:
  Align testcontainers with v1.15 in Gerrit
  Add zookeeper-refdb jar compiled with zookeeper 3.5.x
  Add SSL support for Zookeeper client
  Jenkinsfile: use gerrit-ci-library pipeline for plugin validation
  Revert "Add SSL support for Zookeeper client"
  Add SSL support for Zookeeper client

Change-Id: I105286d4c2e0ad06de9685231e331f05aeb6fc3f
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index b68d6cc..3ddf846 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -53,6 +53,6 @@
 
     maven_jar(
         name = "global-refdb",
-        artifact = "com.gerritforge:global-refdb:3.1.2",
-        sha1 = "6ddee3de0f3fe9254453118ae1eca481ec03e957",
+        artifact = "com.gerritforge:global-refdb:3.3.0",
+        sha1 = "8ef0600757b7468dc023c5030ce2cfeaa8ea0b64",
     )