Update SMF image to fix crash

Crash was seen if DBStore was not enabled.
Also updated SMF readme.

Change-Id: I1be67a3a90208362b20c38cde38f3f36884fe821
diff --git a/5g-control-plane/Chart.yaml b/5g-control-plane/Chart.yaml
index d30d878..df49e3b 100644
--- a/5g-control-plane/Chart.yaml
+++ b/5g-control-plane/Chart.yaml
@@ -10,7 +10,7 @@
 name: 5g-control-plane
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.7.14
+version: 0.7.15
 
 dependencies:
   - name: mongodb
diff --git a/5g-control-plane/values.yaml b/5g-control-plane/values.yaml
index 3a7615c..b55211d 100644
--- a/5g-control-plane/values.yaml
+++ b/5g-control-plane/values.yaml
@@ -9,7 +9,7 @@
     init: omecproject/pod-init:1.0.0
     amf: omecproject/5gc-amf:master-af1c9f1
     nrf: omecproject/5gc-nrf:master-4313faa
-    smf: omecproject/5gc-smf:master-d7c32f2
+    smf: omecproject/5gc-smf:master-d94b123
     ausf: omecproject/5gc-ausf:master-c84dff4
     nssf: omecproject/5gc-nssf:master-4e5aef3
     pcf: omecproject/5gc-pcf:master-bcbdeb0