Add Kafka-Clients bundle to onos-thirdparty-base feature

To ship ONOS log to a Kafka bus, the kafka-clients bundle
is needed. We need a Karaf feature that explicitely includes this bundle,
otherwise if other features or ONOS apps include it the bundle could be
unloaded during de-activation of the apps/features.

Change-Id: Ib05974c08ae13e7f85e6d8c22d8fe6f08ae4f64b
diff --git a/tools/package/features/BUILD b/tools/package/features/BUILD
index ebbbdc0..1d6f9c9 100644
--- a/tools/package/features/BUILD
+++ b/tools/package/features/BUILD
@@ -58,6 +58,7 @@
         "@org_osgi_util_function//jar",
         "@org_osgi_util_promise//jar",
         "@jaxb_api//jar",
+        "@kafka_clients//jar",
     ],
     required_features = [],
     visibility = ["//visibility:public"],