Remove max_containers limit for Docker check
Cleanup Docker example config file
Add socket_timeout parameter to Docker check
Make the container size collection configurable
Remove warning when no containers are running
Make event creation in Docker check optional
Revamp Docker events: aggregate, put details in the body, add container name
Tag docker.containers.running by image
Drop docker.total_* metrics because it is not used and meaningless
Better code structure and comments for Docker check
Make Docker service check monitor the container API only
Merge pull request #1162 from DataDog/docker-5.1

Upgraded Docker check for Agent 5.1