NSX-T is the common name, not "Transformers" or "v3". This makes that
change throughout the docs and conf help. It also fixes a broken link
to the NSX-T pubs.
This change does not rename conf groups and options that use "v3".
That should be considered for a follow-on effort (with appropriate
deprecation).
Change-Id: I466f60e4476cedc439e17cba39a333a3853a32d9
042b6a6600