Create f5_icontrol_bruteforce.rb

This module will attempt to brute force credentials for the F5 iControl API using Basic HTTP authentication. You can download a trial of the F5 BIGIP appliance to test against.
send_request_cgi can auth automatically so you probably don't need to do this. Please see:
https://github.com/rapid7/metasploit-framework/blob/master/lib/rex/proto/http/client.rb#L214