Testcase fix for Bug#14147491

Sleep 1sec before remove_file to solve windows pb2 issues. We hope that
after sleep, the access to the file will not be denied.

mysql-test/suite/innodb/t/innodb_bug14147491.test

@@ -90,6 +90,11 @@ SET DEBUG = '+d,innodb_page_corruption_retries';
 --error 2013
 SELECT * FROM t1;
 
+# The below mtr command --remove_file fails randomly on windows with
+# error number 13 which is permission denied on nix systems. We sleep
+# 1 second hoping that any process holding lock on t1.ibd is released.
+SLEEP 1;
+
 --echo # Restore the original t1.ibd
 --remove_file $MYSQLD_DATADIR/test/t1.ibd
 --move_file $MYSQLD_DATADIR/test/t1.ibd.backup $MYSQLD_DATADIR/test/t1.ibd