Use staging release image as default

Also, remove zmq based cpiface

Change-Id: I18b8d2d41317cfad1fb6e129d21e3e8229711b5d
diff --git a/omec/omec-user-plane/Chart.yaml b/omec/omec-user-plane/Chart.yaml
index 1eb313e..4a10cb1 100644
--- a/omec/omec-user-plane/Chart.yaml
+++ b/omec/omec-user-plane/Chart.yaml
@@ -7,4 +7,4 @@
 name: omec-user-plane
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.3.14
+version: 0.3.15