Add module to enumerate environment HP via perfd daemon

Module to enumerate the environment HP Operation Manager via perfd daemon.

Application: HP Operations Manager Agent (previously called as HP OpenView Operations Agent)
Homepage: http://h71000.www7.hp.com/openvms/products/openvms_ovo_agent/index.html
Videos: https://www.youtube.com/playlist?list=PL9B29471DF0A14D6E

In Windows, check for opened TCP ports by perfd.exe:
```
opcagt | findstr perfd
perfd (Real Time Metric Access Daemon) (14808) Running
perfdsrv (Real Time Metric Access Service) (7532) Running
```
and then:
``` 
netstat -aon | findstr 14808
TCP 0.0.0.0:5227 0.0.0.0:0 LISTENING 14808
TCP 127.0.0.1:5227 127.0.0.1:64351 ESTABLISHED 14808
```
Usage:
```
msf > use auxiliary/gather/hp_enum_perfd
msf auxiliary(hp_enum_perfd) > show options

Module options (auxiliary/gather/hp_enum_perfd):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   CMD      p                yes       Command to execute
   RHOSTS                    yes       The target address range or CIDR identifier
   RPORT    5227             yes       The target port
   THREADS  1                yes       The number of concurrent threads

msf auxiliary(hp_enum_perfd) > set RHOSTS IP
RHOSTS => IP
msf auxiliary(hp_enum_perfd) > run
```
CMD options:
```
msf auxiliary(hp_enum_perfd) > info

       Name: Enum Environment Perfd Daemon
     Module: auxiliary/gather/hp_enum_perfd
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  Roberto Soares Espreto <robertoespreto@gmail.com>

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  CMD      p                yes       Command to execute
  RHOSTS   IP               yes       The target address range or CIDR identifier
  RPORT    5227             yes       The target port
  THREADS  1                yes       The number of concurrent threads

Description:
  Enum Environment Perfd Daemon. Commands: "u" Disks Share, "i" Disk
  space, "p" Process list, "a" Core CPU info, "g" Server status, "l"
  Network Interface (statistics in/out), "T" Scope transactions, "A"
  Others infos, "q" and "Q" => exit.

msf auxiliary(hp_enum_perfd) >
```
Example output:

![p](https://cloud.githubusercontent.com/assets/1926764/4595439/a838bd3c-5099-11e4-9f4e-67793311ee5b.png)

PS: As can be seen above, I changed the path and the filename.

[]'s
@jhart-r7, like this?
```
...snip...
      'Name'        => 'HP Operations Manager perfd environment scanner',
      'Description' => %q{
        This module will enumerate the environment
        HP Operation Manager via daemon perfd.
        (u) Disks Share,
        (i) Disk space,
        (p) Process list,
        (a) CPU info,
        (g) Server status,
        (l) Network Interfaces (statistics in/out),
        (T) Scope transactions,
        (A) Others infos,
        (q) and (Q) exit.
        },
      'Author'      => [ 'Roberto Soares Espreto <robertoespreto[at]gmail.com>' ],
...snip...
```