Bumpup fabric8 kubernetes clients to 5.6.0

Change-Id: I4b6665da030834125ed80b3f0ea2715603eedf71
diff --git a/apps/k8s-networking/api/BUILD b/apps/k8s-networking/api/BUILD
index 45413a7..7673e28 100644
--- a/apps/k8s-networking/api/BUILD
+++ b/apps/k8s-networking/api/BUILD
@@ -11,6 +11,7 @@
     "@k8s_model_certificates//jar",
     "@k8s_model_coordination//jar",
     "@k8s_model_discovery//jar",
+    "@k8s_model_flowcontrol//jar",
     "@k8s_model_metrics//jar",
     "@k8s_model_scheduling//jar",
     "@k8s_model_storageclass//jar",