Update docker labels

[krhubert]

close #1152

Let's change it with the following:

mesg.engine: name of the engine
mesg.hash: hash of the instance
mesg.service: hash of the service
mesg.dependency: name of the dependency
mesg.sid: sid of the service

I've change it a bit to be consistent (s/mesg.hash/mesg.instance/)

mesg.engine: name of the engine
mesg.instance: hash of the instance
mesg.service: hash of the service
mesg.dependency: name of the dependency
mesg.sid: sid of the service

[antho1404]

let's merge this when we finish all the releases

[antho1404]

This has a BREAKING CHANGE, now the CLI needs to update the logs based on the mesg.instance flag