PMM simple - Config need to add skip_rebalance and position_rebalance_threshold_pct

[rapcmia]

Describe the bug

On the latest 2.7.0 and development 2.8.0, market_making.pmm_simple has extra fields when the PMM simple controller-config created:

position_rebalance_threshold_pct: '0.05'
skip_rebalance: false

However this is not the case for controller-configs from dashboard/hummingbot-api, the controlelr config created does not include these fields which I observed automatically enabled the default values causing order submission issue

Sample config generated from hummingbot-api

buy_amounts_pct:
- 1.0
buy_spreads:
- 0.001
candles_config: []
connector_name: binance
controller_name: pmm_simple
controller_type: market_making
cooldown_time: 60.0
executor_refresh_time: 180.0
id: sequence-credit_0.2
leverage: 1
manual_kill_switch: false
position_mode: HEDGE
sell_amounts_pct:
- 1.0
sell_spreads:
- 0.001
stop_loss: 0.003
take_profit: 2.0e-05
take_profit_order_type: 2
time_limit: 300
total_amount_quote: 30
trading_pair: BTC-FDUSD
trailing_stop:
  activation_price: 0.018
  trailing_delta: 0.002

Test: Set total_amount_quote where I use 15usd

• Creates buy and sell order at 7.5 ea
• When the market moves and its outside of the threshod 5% it places market order
• However because the order size is too small it returns retry error due to min order amount which
• To fix:
  • User should be aware of this field and must add skip_rebalance:true then re-deploy the config from dashboard

Steps to reproduce bug

1. Create PMM simple controller-config with using the min order amount on dashboard then upload the config
2. Check hummingbot-api ./bot/conf/controller pmm.simple controller configs
   • Compare with market_making.pmm_simple controller config from standalone hummingbot
3. Deploy a container on dashboard and observe when the bot creates order

[rapcmia]

PR to fix the issue hummingbot/dashboard#253