exchanges: Limit mock test JSON data size by truncating slices and maps (#1968)

* set limiter to first level mock data list and updated unit tests

* address nested slices length limit

* minor fix recording file and update unit tests

* minor updates on unit tests

* re-record mock files and minor fix on the unit tests ti adapt the mock data change

* improve http recording limit value and fix issues with mock data in binance

* added MockDataSliceLimit in request items and resolve minor unit test issues

* resolve missed conflict

* rename mock variables, resolve unit test issues, and other updates

* minor fix to CheckJSON and update unit tests

* minor unit test fix

* further optimization on mock CheckJSON method, unit tests, and re-record poloniex

* common and recording unit tests fix

* minor linter issues fix

* unit tests format fix

* fix miscellaneous error

* unit tests fix and minor docs update

* re-record and reduce mock file size

* indentation fix

* minor assertion test fix

* reverted log.Printf line in live testing

* rename variables

* update NewVCRServer unit test

* replace string comparison with *net.OpError check

* restructur net error test

* exchanges/mock: Remove redundant error assertion message in TestNewVCRServer

---------

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

exchanges/order/order_test.go

@@ -1741,7 +1741,7 @@ func TestMarshalOrder(t *testing.T) {
 		Price:      1000,
 	}
 	j, err := json.Marshal(orderSubmit)
-	require.NoError(t, err, "json.Marshal must not error")
+	require.NoError(t, err, "Marshal must not error")
 	exp := []byte(`{"Exchange":"test","Type":4,"Side":"BUY","Pair":"BTC-USDT","AssetType":"spot","TimeInForce":"","ReduceOnly":false,"Leverage":0,"Price":1000,"Amount":1,"QuoteAmount":0,"TriggerPrice":0,"TriggerPriceType":0,"ClientID":"","ClientOrderID":"","AutoBorrow":false,"MarginType":"multi","RetrieveFees":false,"RetrieveFeeDelay":0,"RiskManagementModes":{"Mode":"","TakeProfit":{"Enabled":false,"TriggerPriceType":0,"Price":0,"LimitPrice":0,"OrderType":0},"StopLoss":{"Enabled":false,"TriggerPriceType":0,"Price":0,"LimitPrice":0,"OrderType":0},"StopEntry":{"Enabled":false,"TriggerPriceType":0,"Price":0,"LimitPrice":0,"OrderType":0}},"Hidden":false,"Iceberg":false,"TrackingMode":0,"TrackingValue":0}`)
 	assert.Equal(t, exp, j)
 }