tests: Remove -w param from mkfs.hfsplus command

tests: Remove -w param from mkfs.hfsplus command

Apparently the man page is outdated because the option "-w" is shown
but not on "mkfs.hfsplus --usage". According to Gemini:

  The -w option is used to add an HFS wrapper around an HFS Plus file
  system, which is sometimes required for compatibility with older
  Mac OS 9 systems. However, this is not a standard or commonly used
  option and may not be available in all versions of the hfsprogs package,
  especially on Linux.

Signed-off-by: Leo Sandoval <lsandova@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>