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>

gctscript/wrappers/gct/gctwrapper_test.go

@@ -1,6 +1,7 @@
 package gct
 
 import (
+	"context"
 	"errors"
 	"log"
 	"os"
@@ -36,7 +37,7 @@ func TestMain(m *testing.M) {
 		os.Exit(1)
 	}
 	exch.SetDefaults()
-	cfg, err := exch.GetDefaultConfig()
+	cfg, err := exch.GetDefaultConfig(context.Background())
 	if err != nil {
 		log.Fatal(err)
 	}