Initial stable-3.3 commit from kafka-events repo

Change-Id: I2767f3d97f1aec8548c97584013475f092275d5c

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 7404abe..61d20ad 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -15,6 +15,6 @@
 
     maven_jar(
         name = "events-broker",
-        artifact = "com.gerritforge:events-broker:3.2.0-rc4",
-        sha1 = "53e3f862ac2c2196dba716756ac9586f4b63af47",
+        artifact = "com.gerritforge:events-broker:3.3.0-rc7",
+        sha1 = "5efe1c4a0f7c385b0ec95b8f9897248049c4173c",
     )