add cube conf

python/examples/criteo_ctr_with_cube/cube/conf/cube.conf

+[{
+    "dict_name": "test_dict",
+    "shard": 1,
+    "dup": 1,
+    "timeout": 200,
+    "retry": 3,
+    "backup_request": 100,
+    "type": "ipport_list",
+    "load_balancer": "rr",
+    "nodes": [{
+        "ipport_list": "list://127.0.0.1:8027"
+    }]
+}]

python/examples/criteo_ctr_with_cube/cube/conf/gflags.conf

+--port=8027
+--dict_split=1
+--in_mem=true
+--log_dir=./log/

python/examples/criteo_ctr_with_cube/cube/keys

+1
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+8
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+10