Fix src/recovery/t/001_stream_rep.pl

Author: Vitaly Davydov

src/test/recovery/t/001_stream_rep.pl

@@ -580,6 +580,9 @@ sub replay_check
 ok( ($phys_restart_lsn_pre cmp $phys_restart_lsn_post) == 0,
 	"physical slot advance persists across restarts");
 
+# Cleanup unused WAL segments
+$node_primary->safe_psql('postgres', "CHECKPOINT;");
+
 # Check if the previous segment gets correctly recycled after the
 # server stopped cleanly, causing a shutdown checkpoint to be generated.
 my $primary_data = $node_primary->data_dir;