Updated golandci-lint to 1.21.0

Signed-off-by: Michał Matczuk <michal@scylladb.com>

gocqlxtest/gocqlxtest.go

@@ -7,7 +7,6 @@ package gocqlxtest
 import (
 	"flag"
 	"fmt"
-	"log"
 	"strings"
 	"sync"
 	"testing"
@@ -24,16 +23,8 @@ var (
 	flagRetry        = flag.Int("retries", 5, "number of times to retry queries")
 	flagCompressTest = flag.String("compressor", "", "compressor to use")
 	flagTimeout      = flag.Duration("gocql.timeout", 5*time.Second, "sets the connection `timeout` for all operations")
-
-	clusterHosts []string
 )
 
-func init() {
-	flag.Parse()
-	clusterHosts = strings.Split(*flagCluster, ",")
-	log.SetFlags(log.Lshortfile | log.LstdFlags)
-}
-
 var initOnce sync.Once
 
 // CreateSession creates a new gocql session from flags.
@@ -43,6 +34,11 @@ func CreateSession(tb testing.TB) *gocql.Session {
 }
 
 func createCluster() *gocql.ClusterConfig {
+	if !flag.Parsed() {
+		flag.Parse()
+	}
+	clusterHosts := strings.Split(*flagCluster, ",")
+
 	cluster := gocql.NewCluster(clusterHosts...)
 	cluster.ProtoVersion = *flagProto
 	cluster.CQLVersion = *flagCQL