Support neutron configuration

Since in OpenStack Havana release the Quantum project was renamed to the
Neutron, for the cookbooks we also need do the same things to support
the Neutron. I do the %s/Quantum/Neutron/g in all the files under
cookbook-openstack-netwrok. It will effect other cookbooks:
openstack-compute, openstack-ops-database which should be covered in
others patches.

Implemented: blueprint neutron-support

Change-Id: I59f3f2d8dfad678f70b97d4cbc4e10dfa163e9b2