add @chao-mu enumusers module

Submitting on behalf of @chao-mu from patch supplied here:
https://dev.metasploit.com/redmine/issues/3723

Module functions as expected:

```
show options

Module options (post/windows/gather/enum_users_details):

   Name        Current Setting  Required  Description
   ----        ---------------  --------  -----------
   GROUP_INFO  false            yes       Display local and global group information
   LEVEL       0                yes       Corresponds to the "levels" used by NetUserEnum (accepted: 0, 1, 2, 3)
   SERVER                       no        Server on which to run this command
   SESSION     6                yes       The session to run this module on.
   SHOWN       normal_account   yes       What kind of accounts will be enumerated (accepted: all, normal_account, temp_duplicate_account, workstation_trust_account, server_trust_account, interdomain_trust_account)

msf  post(enum_users_details) > run

[*] Enumerating users...
[+] Account name: Administrator
[+] Account name: evilattacker
[+] Account name: Guest
[+] Account name: HelpAssistant
[+] Account name: SUPPORT_388945a0
[*] Post module execution completed

```