HSS, PCRF image update to fix memory leak

Log into file only if configuration has non-empty filename.

Change-Id: I0c8a7501ae7285fa800d93f6b8f423e7e8154759
diff --git a/omec-control-plane/Chart.yaml b/omec-control-plane/Chart.yaml
index 73da866..348ea6a 100644
--- a/omec-control-plane/Chart.yaml
+++ b/omec-control-plane/Chart.yaml
@@ -9,4 +9,4 @@
 name: omec-control-plane
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.9.20
+version: 0.9.21