Move resource controls to systemd
Since we are using systemd-docker to wrap Docker containers, and we are moving the process to the systemd cgroups (https://github.com/ibuildthecloud/systemd-docker#cgroups), that's where we should set resource limits, not on the Docker config. See https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html for reference.
Edited by ale