Update omec-user-plan chart

1) Add an option to send gratuitous ARP reply
2) Add default dnn and hostname
3) Change the image name used in coredump init container to tools
4) Adjust resource req/limits for init container
5) Update pfcp agent container name from cpiface to pfcp-agent

Change-Id: I110c7d7cc6f58ab20ae7d374ae92d72e315cd80e
diff --git a/omec/omec-user-plane/templates/_helpers.tpl b/omec/omec-user-plane/templates/_helpers.tpl
index 56f80d7..f2d1a61 100644
--- a/omec/omec-user-plane/templates/_helpers.tpl
+++ b/omec/omec-user-plane/templates/_helpers.tpl
@@ -34,7 +34,7 @@
 {{- $pod := index . 0 -}}
 {{- $context := index . 1 -}}
 - name: {{ $pod }}-coredump-init
-  image: {{ $context.Values.images.tags.init | quote }}
+  image: {{ $context.Values.images.tags.tools | quote }}
   imagePullPolicy: {{ $context.Values.images.pullPolicy }}
   securityContext:
     privileged: true
diff --git a/omec/omec-user-plane/templates/statefulset-upf.yaml b/omec/omec-user-plane/templates/statefulset-upf.yaml
index 050f0aa..f933a5f 100644
--- a/omec/omec-user-plane/templates/statefulset-upf.yaml
+++ b/omec/omec-user-plane/templates/statefulset-upf.yaml
@@ -68,11 +68,11 @@
             - NET_ADMIN
         resources:
           limits:
-            cpu: 256m
-            memory: 128Mi
+            cpu: 128m
+            memory: 64Mi
           requests:
-            cpu: 256m
-            memory: 128Mi
+            cpu: 128m
+            memory: 64Mi
     {{- if .Values.config.coreDump.enabled }}
 {{ tuple "upf" . | include "omec-user-plane.coredump_init" | indent 6 }}
     {{- end }}
@@ -175,7 +175,7 @@
         resources:
 {{ toYaml .Values.resources.web | indent 10 }}
       {{- end }}
-      - name: cpiface
+      - name: pfcp-agent
         image: {{ .Values.images.tags.pfcpiface | quote }}
         imagePullPolicy: {{ .Values.images.pullPolicy | quote }}
         command: ["pfcpiface"]
@@ -191,6 +191,26 @@
             mountPath: /pod-share
           - name: configs
             mountPath: /tmp/conf
+    {{- if .Values.config.gratuitousArp.enabled }}
+      - name: arping
+        image: {{ .Values.images.tags.tools | quote }}
+        imagePullPolicy: {{ .Values.images.pullPolicy | quote }}
+        command: ["sh", "-xec"]
+        args:
+          - |
+            while true; do
+              arping -c 3 -A -I {{ index $accessConfig "ifname" }} {{ (split "/" .Values.config.upf.access.ip)._0 }}
+              arping -c 3 -A -I {{ index $coreConfig "ifname" }} {{ (split "/" .Values.config.upf.core.ip)._0 }}
+              sleep {{ .Values.config.gratuitousArp.interval }}
+            done
+        resources:
+          limits:
+            cpu: 128m
+            memory: 64Mi
+          requests:
+            cpu: 128m
+            memory: 64Mi
+    {{- end }}
       volumes:
       - name: configs
         configMap: