Remove ms08_067 exploiter

[mssalvatore]

The ms08_067 exploiter is only valid for very old systems (Windows Server 2008 and earlier). It causes Infection Monkey to be flagged by Windows Defender. Since this vulnerability is so old, this exploiter is more trouble than it's worth.

• [x] Remove the ms08_067 exploiter (0d) @mssalvatore
  • [x] Remove exploiter code
  • [x] Remove shellcode_obfuscator.py
  • [x] Remove exploiter from UI/Config schemas
• [x] Test that Windows Defender no longer flags Monkey Island MSI or Infection Monkey binaries (0d) @mssalvatore

[mssalvatore]

This branch removes the ms08_067 exploiter. Windows defender still detects the monkey agent as malicious. More investigation is needed as to the cause.