tests: fix test-data setup for usdt trades

tests/conftest_trades_usdt.py

@@ -224,7 +224,7 @@ def mock_trade_usdt_4(fee, is_short: bool):
     trade = Trade(
         pair="NEO/USDT",
         stake_amount=20.0,
-        amount=10.0,
+        amount=0.0,
         amount_requested=10.01,
         fee_open=fee.return_value,
         fee_close=fee.return_value,

tests/test_wallets.py

@@ -362,7 +362,8 @@ def test_sync_wallet_dry(mocker, default_conf_usdt, fee):
     assert len(freqtrade.wallets._wallets) == 5
     assert len(freqtrade.wallets._positions) == 0
     bal = freqtrade.wallets.get_all_balances()
-    assert bal["NEO"].total == 10
+    # NEO trade is not filled yet.
+    assert bal["NEO"].total == 0
     assert bal["XRP"].total == 10
     assert bal["LTC"].total == 2
     usdt_bal = bal["USDT"]