Consistently set the search path to prefer PROJECT_ROOT as the source
of packages to import if we are using local tools instead of pip
installed kolla tools.
TrivialFix
Change-Id: Idd1d98bb82a8f1ddb32d1bdb23f346b461534b9f
In some part in the code we import objects. In the Openstack style
guidelines they recommend to import only modules.
http://docs.openstack.org/developer/hacking/#imports
Change-Id: I4b55cae8c2672f82025a95112b14d441d66f9d6d