Mysqlconnector

[pier485]

The pull request is about the implementation of MySQL connector for Darwin. The code is provided with a docker to test the new connector. Dockerfile defines an image with MariaDB server and Scala and automatically downloads the branch. To create the docker image and run it:

docker build -t darwin . docker run --name darwin -e "MYSQL_ROOT_PASSWORD=mysqlpwd" darwin

To execute the tests: docker exec -it darwin /darwin/init-db-and-launch-tests.sh