Add DP_NAME in DP ENV

Change-Id: I716292c5411813f61ea519914c54557139a3000c
diff --git a/omec/omec-data-plane/templates/statefulset-spgwu.yaml b/omec/omec-data-plane/templates/statefulset-spgwu.yaml
index 07f9082..35b6304 100644
--- a/omec/omec-data-plane/templates/statefulset-spgwu.yaml
+++ b/omec/omec-data-plane/templates/statefulset-spgwu.yaml
@@ -92,6 +92,8 @@
           valueFrom:
             fieldRef:
               fieldPath: status.podIP
+        - name: DP_NAME
+          value: "{{ .Values.config.spgwu.dpName }}"
         command: ["bash", "-xc"]
         args:
         - ip a;