fix linter

management/server/geolocation/geolocation_test.go

@@ -24,7 +24,7 @@ func TestGeoLite_Lookup(t *testing.T) {
 	db, err := openDB(filename)
 	assert.NoError(t, err)
 
-	geo := &Geolocation{
+	geo := &GeolocationImpl{
 		mux:    sync.RWMutex{},
 		db:     db,
 		stopCh: make(chan struct{}),

management/server/integrated_validator.go

@@ -114,8 +114,9 @@ func (MocIntegratedValidator) PeerDeleted(_ context.Context, _, _ string) error
 }
 
 func (MocIntegratedValidator) SetPeerInvalidationListener(func(accountID string)) {
-
+	// just a dummy
 }
 
 func (MocIntegratedValidator) Stop(_ context.Context) {
+	// just a dummy
 }

relay/client/picker_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"testing"
+	"time"
 )
 
 func TestServerPicker_UnavailableServers(t *testing.T) {