Current version is not working with multi-site

A couple of issues are preventing the broker to work:
* different events-broker version from multi-site
* missing jackson-annotations library, previously erroneously removed [1]

Still outstanding to understand why the tests didn't catch any of those issues [2].

[1]: https://gerrit-review.googlesource.com/c/plugins/events-aws-kinesis/+/304062
[2]: https://bugs.chromium.org/p/gerrit/issues/detail?id=14458

Bug: Issue 14454
Change-Id: I4d292ead59f95b05d581fdf04e0972ad10a9280c

BUILD

diff --git a/BUILD b/BUILD
index d6e7c47..8fdbdc3 100644
--- a/BUILD
+++ b/BUILD
@@ -43,6 +43,7 @@
         "@commons-codec//jar",
         "@events-broker//jar:neverlink",
         "@io-netty-all//jar",
+        "@jackson-annotations//jar",
         "@jackson-databind//jar",
         "@jackson-dataformat-cbor//jar",
         "@javax-xml-bind//jar",

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 0006f37..a12df29 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -109,8 +109,8 @@
 
     maven_jar(
         name = "events-broker",
-        artifact = "com.gerritforge:events-broker:3.3.2",
-        sha1 = "d8bcb77047cc12dd7c623b5b4de70a25499d3d6c",
+        artifact = "com.gerritforge:events-broker:3.3.1",
+        sha1 = "90775e671946b20e52be3a11277d1ed33973d66e",
     )
 
     maven_jar(