Fix race condition of concurrent RENAME and SHOW TABLES which caused

random test failures.


mysql-test/t/rename.test:
  Fix race condition and add cleanup code.

mysql-test/t/rename.test

@@ -61,9 +61,15 @@ connection con2;
 sleep 1;
 show tables;
 UNLOCK TABLES;
-sleep 1;
+connection con1;
+reap;
+connection con2;
 show tables;
 
 drop table t2, t4;
 
+disconnect con2;
+disconnect con1;
+connection default;
+
 # End of 4.1 tests