HP System Management Homepage LoginScanner Upgrade

This upgrades the hp_sys_mgmt_login.rb module to LoginScanner.

## Verification Steps: ##

- [x] Download **SMH 7.4 for Windows (x86)**: http://h18013.www1.hp.com/products/servers/management/agents/
- [x] Run the installer of HP System Management Homepage on a Windows box.
- [x] In the setup process, the group name is the host name which you can find in ```ipconfig /all```
- [x] Choose a Trust mode. In my test box, I did "Trust All"
- [x] Leave the rest of the options default (basically you just keep pressing next until it starts installing)
- [x] After the installation is done, make sure SMH is up and running by browsing to: https://localhost:2381/
- [x] Start msfconsole
- [x] Use auxiliary/scanner/http/hp_sys_mgmt_login
- [ ] set a valid username and password, make sure you get a successful login attempt
- [x] Rerun with a bad password, this time you should get a failed login attempt