Konica MFP FTP and SMB credential gathering module

This PR is for the Konica Minolta series multifunction printer. This module will extracted SMB and FTP credentials configured on the device for interaction with other network storage services.
Below is an example of the options available for this module.
![konica_options](https://cloud.githubusercontent.com/assets/6502552/4834345/f77fea10-5fac-11e4-9b1b-db98f878bbbe.png)

Steps to launch credential gathering against vulnerable Konica Minolta devices:

- [ ] set RHOST to targeted Konica devices IP address
- [ ] set RPORT to target the Konica's configured soap services. The default port number is '50001' 
- [ ] set USER to device admin account. The current default is 'admin'
- [ ] set PASSWD to devices configured admin password. The current default is '12345678'

Below is an example of the module being used to retreive the configured FTP credentials from a Konica Devices.
![konica-2](https://cloud.githubusercontent.com/assets/6502552/4834610/425e7c16-5faf-11e4-93b7-221d6b3db2f9.png)



Currently do not have a test system. Working on tracking one down

`Rex::ConnectionError` encompasses all of these and more. Please use it instead.