cmd/wrapper_coverage: prevent non-needed REST requests via context timeout (#1154)

* wrapper_coverage/exchanges: cancel context to not send rest requests/ populate context through functions that do rest requests

* linter: fix

* exchange_template: fix test

---------

Co-authored-by: Ryan O'Hara-Reid <ryan.oharareid@thrasher.io>

engine/order_manager_test.go

@@ -265,7 +265,7 @@ func OrdersSetup(t *testing.T) *OrderManager {
 	}
 	exch.SetDefaults()
 
-	cfg, err := exch.GetDefaultConfig()
+	cfg, err := exch.GetDefaultConfig(context.Background())
 	if err != nil {
 		t.Fatal(err)
 	}