Add requires

Author: Meatballs1

lib/msf/core/post/windows/mssql.rb

@@ -1,4 +1,7 @@
 # -*- coding: binary -*-
+require 'msf/core/post/windows/services'
+require 'msf/core/post/windows/priv'
+require 'msf/core/exploit/mssql_commands'
 
 module Msf
 class Post