Increase statesync test timeout from 30s to 120s

The sync tests take 40-70 seconds depending on system load.
30s timeout causes spurious failures.

sync/statesync/sync_test.go

@@ -30,7 +30,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-const testSyncTimeout = 30 * time.Second
+const testSyncTimeout = 120 * time.Second
 
 var errInterrupted = errors.New("interrupted sync")