Fixes I/O redirection bug in FreeRadius attack & f_Quit() adjustments

When spawning a FreeRadius AP an error was occuring during the 

```mv ${pathtoradiusconf}/radiusd.conf ${pathtoradiusconf}/radiusd.conf.back 2&1> /dev/null ``` command

I/O redirection should be ```2>&1 ...``` so I made the fix.

In the f_Quit() function easy-creds removes the log directory if a poisoning attack is stopped but if any further attacks are attempted the directory is now empty and thus causes issues. I just commented out the line in f_Quit() for the time being until an adequate solution is devised. When the exiting function is called all temporary directories will be cleaned up thus the clean up in f_Quit() after poisoning is not needed.

Thanks to [Karthik Rangarajan](https://github.com/karthikrangarajan) for originally pointing out these errors