Build events-kafka plugin on stable-2.16/3.0

Create the CI builds for the newly renamed
events-kafka plugin for stable-2.16 and stable-3.0.
Also define the build validation pipeline for
all incoming changes on the new plugin.

Change-Id: I7c1d9c2864ffceafac76f33bd58917f2dced30b9
diff --git a/jenkins/gerrit-bazel-plugin-events-kafka.yaml b/jenkins/gerrit-bazel-plugin-events-kafka.yaml
new file mode 100644
index 0000000..ec62ef4
--- /dev/null
+++ b/jenkins/gerrit-bazel-plugin-events-kafka.yaml
@@ -0,0 +1,12 @@
+- project:
+    name: events-kafka
+    jobs:
+      - 'plugin-{name}-bazel-{branch}-{gerrit-branch}':
+          branch:
+            - master
+          gerrit-branch:
+            - stable-3.0
+      - 'plugin-{name}-bazel-{branch}':
+          branch:
+            - stable-2.16
+      - 'plugin-{name}-verifier'