1.11.0-0.4.0

Full Changelog: 1.11.0-0.3.0...1.11.0-0.4.0

• Docker Containerizer now supports CGroupsV2. It will be enabled by the Agent flag "--enable_cgroupv2". If its enabled, currently it will
  break the mesos containerizer.
• Add cleanup_log_files flag to the agent and the master to keep only log files from the last 'n days.
• Cleanup repository and remove more unneeded files. It will be enabled by the Agent flag "--cleanup_log_file" and the number of days that it should keep log files.
• Update glog to version 0.6.0.
• Update libevent to version 2.1.12.
• Move mesos-mini to it's own repository (https://github.com/m3scluster/mesos-mini).
• Remove mesos-tidy and mesos-website builder.
• Remove python dependencies and move the "new" mesos-cli to it's on repository (https://github.com/m3scluster/mesos-cli).
• Remove the old mesos-cli.
• Update zookeeper client to version 3.8.2.
• Update libboost to version 1.83.0.
• Change to c++14
• Update jquery to version 3.7.1.
• Change docker networking. If no docker network and no docker net attribute was given, add default networking.
• Cleanup CNI if the docker container exited due to an error.