Add istio friendly port names

This commit changes the port names in the various service definitions to
follow the istio [naming convention](https://istio.io/docs/ops/configuration/traffic-management/protocol-selection/).
This helps the Kube-arangodb operator play nice with both istio and
observability tools like [Kiali](https://git.io/Jfesl).

Author: sleepycat

Diff for: manifests/arango-backup.yaml

@@ -117,7 +117,7 @@ metadata:
     release: backup
 spec:
   ports:
-    - name: server
+    - name: tcp-8529
       port: 8528
       protocol: TCP
       targetPort: 8528

Diff for: manifests/arango-deployment-replication.yaml

@@ -114,7 +114,7 @@ metadata:
     release: deployment-replication
 spec:
   ports:
-    - name: server
+    - name: tcp-8529
       port: 8528
       protocol: TCP
       targetPort: 8528

Diff for: manifests/arango-deployment.yaml

@@ -161,7 +161,7 @@ metadata:
     release: deployment
 spec:
   ports:
-    - name: server
+    - name: tcp-8529
       port: 8528
       protocol: TCP
       targetPort: 8528

Diff for: manifests/arango-storage.yaml

@@ -146,7 +146,7 @@ metadata:
     release: storage
 spec:
   ports:
-    - name: server
+    - name: tcp-8529
       port: 8528
       protocol: TCP
       targetPort: 8528