Full-stack white-box tests framework

This proposes a new framework for white-box tests which will be
implemented overtime. Full-stack tests are designed to check Neutron
as a whole, with no dependencies from other projects (like keystone).

bp integration-tests

Change-Id: Iab062490c7c01a1ef7c5cc175c7c9f324a892744
Merge "Full-stack white-box tests framework"