Merge advanced features from Networking Admin Guide into Cloud Admin Guide

Added advanced features differences to Networking chapter of Cloud Admin Guide
Removed Networking Admin Guide
Applied stylistic edits to the edited file
This marks Cloud Admin Guide complete

Change-Id: I9b04acba9980b46eed1c7538fea24a6f6e835244
Closes-bug: 1229864
Author: Nermina Miller
Merge "Merge advanced features from Networking Admin Guide into Cloud Admin Guide"