Apparently we had most of our networking context in the multitenancy
document, leading to confusion and also a lacking background context
which is needed for users to understand mechanics.
These changes have been broken into several different changes
because the file is going to be drastically different once we
done clarifying the documentation.
Change-Id: I7fd76a00d9bb344453fc1b214f170113d73fe9bc
e02fa1591d