Changed the name of configure_dragent
Removed the network.yaml file requirement for tests
Made a bright line distinction between declared overcloud network
settings and environment specific undercloud settings
The tests will declare the overcloud settings and acquire the
undercloud settings from environment variables.
Add the testing required for neutron dynamic routing A.K.A dragent.
Create the zaza.charm_tests.dragent module for testing neutron dynamic
routing.
Create the zaza.configure module for reusable configuration tools.
Update utilities to simplify authenticating clients.
Bring over only those utilities required to run network_setup.py from
openstack-mojo-specs. These utilities have been generalized and python3
configured. Use libjuju whenever possible and pre-deprecate anything
else.
Add addition functions to the model.
