Use leverage-tiers loading in tests

tests/conftest.py

@@ -148,7 +148,7 @@ def get_patched_exchange(mocker, config, api_mock=None, id='binance',
     patch_exchange(mocker, api_mock, id, mock_markets, mock_supported_modes)
     config['exchange']['name'] = id
     try:
-        exchange = ExchangeResolver.load_exchange(id, config)
+        exchange = ExchangeResolver.load_exchange(id, config, load_leverage_tiers=True)
     except ImportError:
         exchange = Exchange(config)
     return exchange

tests/exchange/test_ccxt_compat.py

@@ -137,7 +137,8 @@ def exchange_futures(request, exchange_conf, class_mocker):
             'freqtrade.exchange.binance.Binance.fill_leverage_tiers')
         class_mocker.patch('freqtrade.exchange.exchange.Exchange.fetch_trading_fees')
         class_mocker.patch('freqtrade.exchange.okx.Okx.additional_exchange_init')
-        exchange = ExchangeResolver.load_exchange(request.param, exchange_conf, validate=True)
+        exchange = ExchangeResolver.load_exchange(
+            request.param, exchange_conf, validate=True, load_leverage_tiers=True)
 
         yield exchange, request.param