API GET to return only minimal data

Requests to list top-level resources like nodes, chassis or ports will
now return only a subset of it's attributes, a subresource called /detail
could be used to get the full details of the resource. This changes
is supposed to improve performance and UX, also, others OpenStack APIs
already do it the same way so it's also about being consistent between
other APIs.

Change-Id: Ida45febf60e44d50e506f3680ab371e1027010c4
Closes-Bug: #1227431
Merge "API GET to return only minimal data"