Fix telegraf upgrade permission issue

Change-Id: If906f9a125f2fe11d1deb7eea5af4bcea3feac18
Partial-Bug: #1631503

ansible/roles/telegraf/templates/telegraf.json.j2

@@ -13,5 +13,12 @@
             "owner": "telegraf",
             "perm": "0600"
         }
+    ],
+    "permissions": [
+        {
+            "path": "/var/log/kolla/telegraf",
+            "owner": "telegraf:telegraf",
+            "recurse": true
+        }
     ]
 }