Configure Brocade plug-in - minor edit to Cloud Administrator Guide

1) Removing the "www" from the Brocade ncclient address so the
address to clone from is now "https://github.com/brocade/ncclient", which
matches the correct github address.

Change-Id: I7ffe5e6f3f1b23aa7f64888605ac5285e0b990fa
backport: none
Closes-Bug: #1376657
Merge "Configure Brocade plug-in - minor edit to Cloud Administrator Guide"