Bug#22157027 - LOG_BASED_DISCOVERY.TEST FAILS ON PB2 WITH PARALLEL VALUE 1

Problem:
--------
The test fails because of two reasons
1) On linux platforms EL6/EL7, --exec MYSQLD fails because of
--secure-file-priv option. It is only allowed to write in /lib/mysql/var
by default

2) On checkpoint, there is no redo to be applied even after
kill_mysqld.inc. So the search for pattern "Cannot load UNDO
tablespace" will fail

3) On windows, if innodb_undo_directory is used and server is crashed
during DMLs, server refuses to start.

Fix:
----
For 1): use --secure-file-priv="" to --exec MYSQLD
For 2): use --no_checkpoint_start.inc and --no_checkpoint_end.inc
For 3): use os_normalize_path() to succeed.

4) moved cleanup_folder.inc from innodb suite to mysql-test/include
5) Removed have_linux.inc from log_based_discovery

Reviewed-By:  <marko.makela@oracle.com>
RB: 12009