Add a couple unrequired libraries (NSE)

scripts/http-domino-enum-passwords.nse

@@ -4,6 +4,7 @@ local io = require "io"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
+local string = require "string"
 local table = require "table"
 
 description = [[

scripts/smb-enum-shares.nse

@@ -1,6 +1,7 @@
 local smb = require "smb"
 local stdnse = require "stdnse"
 local string = require "string"
+local table = require "table"
 
 description = [[
 Attempts to list shares using the <code>srvsvc.NetShareEnumAll</code> MSRPC function and