update rov-server instance tag

rov-sever/server/ess-instance-rov-server.py

@@ -78,8 +78,8 @@ def build_request():
     request.set_KeyPairName(key_pair_name)
     request.set_Tags([
       {
-        "Key": "app",
-        "Value": "rov-server"
+        "Key": "ecs",
+        "Value": "rov-server.prod"
       }
     ])
     return request