gnbsim & sub-privision helm changes

Update simapp image
Update helm chart to provide default key, opc,

Change-Id: Ibed5ece059667a3a96b995473752a93b8a7dd010
diff --git a/5g-ran-sim/Chart.yaml b/5g-ran-sim/Chart.yaml
index 0719590..e69d59a 100644
--- a/5g-ran-sim/Chart.yaml
+++ b/5g-ran-sim/Chart.yaml
@@ -8,4 +8,4 @@
 name: 5g-ran-sim
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.5.2
+version: 0.5.3