DHC-1456 Update Akanda/Neutron plugins for Havana

Update the configure methods to use the renamed classes and
make akanda-nova and akanda-quantum use the havana branch

Change-Id: I9cdfd4f7f1781bd4a75eb2f93262964894b60e91
Signed-off-by: Rosario Di Somma <rosario.disomma@dreamhost.com>