roc-umbrella: releas 2.1.16 for gui fixes in  0.9.21

Change-Id: I016854ff83e5407d4abdc183ffba3fb883dc71d7
diff --git a/aether-roc-gui/values.yaml b/aether-roc-gui/values.yaml
index 44a76aa..7434367 100644
--- a/aether-roc-gui/values.yaml
+++ b/aether-roc-gui/values.yaml
@@ -10,7 +10,7 @@
 
 image:
   repository: onosproject/aether-roc-gui
-  tag: v0.9.19
+  tag: v0.9.21
   pullPolicy: IfNotPresent
   pullSecrets: []