Rewrite to remove network_mode flag from docker-compose

[nunojusto]

Problem

Solving https://github.com/CityOfZion/neo-local/issues/148 network_mode=host is used on neo-python to reach nodes ports exposed to the host, but this is only supported on linux. Does not work on Mac nor Windows because docker runs inside a Vm (docker-engine) as described here

Solution

• Created two networks. One for inside connections and other running on the host
• Changed neo-python protocol config file for privatenet to point to neo-cli container names

Checklist

• [x] I have ran the tests locally.
• [x] I branched off of the develop branch and not master.
• [x] I did not change the VERSION file.