mme image update with tau reject fix

Change-Id: I8819a8a6b79b6997b7e730a1c7663e50672ffd42
diff --git a/omec-control-plane/values.yaml b/omec-control-plane/values.yaml
index e9f2b2e..6beb23c 100644
--- a/omec-control-plane/values.yaml
+++ b/omec-control-plane/values.yaml
@@ -10,7 +10,7 @@
     depCheck: quay.io/stackanetes/kubernetes-entrypoint:v0.3.1
     hssdb: registry.aetherproject.org/proxy/omecproject/c3po-hssdb:master-771c0c3
     hss: registry.aetherproject.org/proxy/omecproject/c3po-hss:master-771c0c3
-    mme: registry.aetherproject.org/proxy/omecproject/nucleus:master-11812cf
+    mme: registry.aetherproject.org/proxy/omecproject/nucleus:master-a503ae3
     spgwc: registry.aetherproject.org/omecproject/spgw:master-4fce2e6
     pcrf: registry.aetherproject.org/proxy/omecproject/c3po-pcrf:pcrf-a6bdc3d
     pcrfdb: registry.aetherproject.org/proxy/omecproject/c3po-pcrfdb:pcrf-a6bdc3d