Add missing cleanup logic in pg_rewind/t/005_same_timeline.pl test.

Per Michael Paquier

Author: tglsfdc

src/bin/pg_rewind/t/005_same_timeline.pl

@@ -12,3 +12,5 @@
 RewindTest::start_master();
 RewindTest::create_standby();
 RewindTest::run_pg_rewind('local');
+RewindTest::clean_rewind_test();
+exit(0);