Reorganize the mess into a more pythonic way

[arnaud-morvan]

• Create a folder with python files (maybe create a package)

And we could also:

• Format code with back

• Add linter

• Run tests on CI (maybe using Docker)

• Install requirements.txt in Dockerfile instead of duplicated list of dependencies

• Use request everywhere so we can easily write tests using responses

We can also remove .travis.yaml

Not sure we can still user docker folder, it says:

COPY geonetwork.war /var/lib/jetty/webapps
COPY geoserver.war /var/lib/jetty/webapps

But there is nothing else about geonetwork.war or geoserver.war.

Readme says : You should now have a geoserver 2.10 and a geonetwork 3.2 available.

I would prefer a docker-compose.yaml file instead, or instructions to run georchestra/docker