This change makes Astara compatible with Newton. This change adds support
for Neutron agent reporting and service providers to work with new L3
drivers. Included in this change is a temporary filed called newton_fix.py.
This file will be removed in follow-up change after changes are migrated to
astara-neutron.
Change-Id: I5843e84e36af2e46de5b8420ca5749033c26ee69