Refactor hp_enum_perfd for better looting

A few style changes plus storing just the banner for the service and the rest as loot.  Also, support running more than one command.

It now looks like:

```
msf auxiliary(hp_enum_perfd) > run

[+] 1.2.3.4:5227, Perfd server banner: Welcome to the perfd server. Hit <RETURN> to continue.
[*] 1.2.3.4:5227 - HP Ops Agent perfd u saved in: /home/jhart/.msf4/loot/20141011114321_blah44_1.2.3.4_hp.ops.agent.per_639769.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd i saved in: /home/jhart/.msf4/loot/20141011114322_blah44_1.2.3.4_hp.ops.agent.per_191505.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd p saved in: /home/jhart/.msf4/loot/20141011114324_blah44_1.2.3.4_hp.ops.agent.per_700482.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd a saved in: /home/jhart/.msf4/loot/20141011114325_blah44_1.2.3.4_hp.ops.agent.per_700091.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd g saved in: /home/jhart/.msf4/loot/20141011114326_blah44_1.2.3.4_hp.ops.agent.per_638440.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd l saved in: /home/jhart/.msf4/loot/20141011114327_blah44_1.2.3.4_hp.ops.agent.per_354406.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd T saved in: /home/jhart/.msf4/loot/20141011114328_blah44_1.2.3.4_hp.ops.agent.per_848307.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd A saved in: /home/jhart/.msf4/loot/20141011114330_blah44_1.2.3.4_hp.ops.agent.per_853753.txt
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
msf auxiliary(hp_enum_perfd) > services 

Services
========

host         port  proto  name   state  info
----         ----  -----  ----   -----  ----
1.2.3.4  5227  tcp    perfd  open   Welcome to the perfd server. Hit <RETURN> to continue.

msf auxiliary(hp_enum_perfd) > loot

Loot
====

host         service  type                  name  content     info                  path
----         -------  ----                  ----  -------     ----                  ----
1.2.3.4  perfd    hp.ops.agent.perfd.A        text/plain  HP Ops Agent perfd A  /home/jhart/.msf4/loot/20141011114330_blah44_1.2.3.4_hp.ops.agent.per_853753.txt
1.2.3.4  perfd    hp.ops.agent.perfd.T        text/plain  HP Ops Agent perfd T  /home/jhart/.msf4/loot/20141011114328_blah44_1.2.3.4_hp.ops.agent.per_848307.txt
1.2.3.4  perfd    hp.ops.agent.perfd.l        text/plain  HP Ops Agent perfd l  /home/jhart/.msf4/loot/20141011114327_blah44_1.2.3.4_hp.ops.agent.per_354406.txt
1.2.3.4  perfd    hp.ops.agent.perfd.g        text/plain  HP Ops Agent perfd g  /home/jhart/.msf4/loot/20141011114326_blah44_1.2.3.4_hp.ops.agent.per_638440.txt
1.2.3.4  perfd    hp.ops.agent.perfd.a        text/plain  HP Ops Agent perfd a  /home/jhart/.msf4/loot/20141011114325_blah44_1.2.3.4_hp.ops.agent.per_700091.txt
1.2.3.4  perfd    hp.ops.agent.perfd.p        text/plain  HP Ops Agent perfd p  /home/jhart/.msf4/loot/20141011114324_blah44_1.2.3.4_hp.ops.agent.per_700482.txt
1.2.3.4  perfd    hp.ops.agent.perfd.i        text/plain  HP Ops Agent perfd i  /home/jhart/.msf4/loot/20141011114322_blah44_1.2.3.4_hp.ops.agent.per_191505.txt
1.2.3.4  perfd    hp.ops.agent.perfd.u        text/plain  HP Ops Agent perfd u  /home/jhart/.msf4/loot/20141011114321_blah44_1.2.3.4_hp.ops.agent.per_639769.txt

msf auxiliary(hp_enum_perfd) > set COMMANDS p
COMMANDS => p
msf auxiliary(hp_enum_perfd) > run

[+] 1.2.3.4:5227, Perfd server banner: Welcome to the perfd server. Hit <RETURN> to continue.
[*] 1.2.3.4:5227 - HP Ops Agent perfd p saved in: /home/jhart/.msf4/loot/20141011114352_blah44_1.2.3.4_hp.ops.agent.per_729987.txt
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
msf auxiliary(hp_enum_perfd) > loot

Loot
====

host         service  type                  name  content     info                  path
----         -------  ----                  ----  -------     ----                  ----
1.2.3.4  perfd    hp.ops.agent.perfd.p        text/plain  HP Ops Agent perfd p  /home/jhart/.msf4/loot/20141011114352_blah44_1.2.3.4_hp.ops.agent.per_729987.txt
1.2.3.4  perfd    hp.ops.agent.perfd.A        text/plain  HP Ops Agent perfd A  /home/jhart/.msf4/loot/20141011114330_blah44_1.2.3.4_hp.ops.agent.per_853753.txt
1.2.3.4  perfd    hp.ops.agent.perfd.T        text/plain  HP Ops Agent perfd T  /home/jhart/.msf4/loot/20141011114328_blah44_1.2.3.4_hp.ops.agent.per_848307.txt
1.2.3.4  perfd    hp.ops.agent.perfd.l        text/plain  HP Ops Agent perfd l  /home/jhart/.msf4/loot/20141011114327_blah44_1.2.3.4_hp.ops.agent.per_354406.txt
1.2.3.4  perfd    hp.ops.agent.perfd.g        text/plain  HP Ops Agent perfd g  /home/jhart/.msf4/loot/20141011114326_blah44_1.2.3.4_hp.ops.agent.per_638440.txt
1.2.3.4  perfd    hp.ops.agent.perfd.a        text/plain  HP Ops Agent perfd a  /home/jhart/.msf4/loot/20141011114325_blah44_1.2.3.4_hp.ops.agent.per_700091.txt
1.2.3.4  perfd    hp.ops.agent.perfd.p        text/plain  HP Ops Agent perfd p  /home/jhart/.msf4/loot/20141011114324_blah44_1.2.3.4_hp.ops.agent.per_700482.txt
1.2.3.4  perfd    hp.ops.agent.perfd.i        text/plain  HP Ops Agent perfd i  /home/jhart/.msf4/loot/20141011114322_blah44_1.2.3.4_hp.ops.agent.per_191505.txt
1.2.3.4  perfd    hp.ops.agent.perfd.u        text/plain  HP Ops Agent perfd u  /home/jhart/.msf4/loot/20141011114321_blah44_1.2.3.4_hp.ops.agent.per_639769.txt

msf auxiliary(hp_enum_perfd) > set COMMANDS p a
COMMANDS => p a
msf auxiliary(hp_enum_perfd) > run

[+] 1.2.3.4:5227, Perfd server banner: Welcome to the perfd server. Hit <RETURN> to continue.
[*] 1.2.3.4:5227 - HP Ops Agent perfd p saved in: /home/jhart/.msf4/loot/20141011114409_blah44_1.2.3.4_hp.ops.agent.per_401299.txt
[*] 1.2.3.4:5227 - HP Ops Agent perfd a saved in: /home/jhart/.msf4/loot/20141011114410_blah44_1.2.3.4_hp.ops.agent.per_811951.txt
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
```