Scope labels to avoid collisions

[ogmueller]

It would be really nice, if all ofelia labels are scoped to the container ID/name.

Example:
If a hoster has many docker compose project, it can happen, that the project is using the same labels for ofelia than another project.
These are our labels for a project, where we call an optimize method.

       - "ofelia.enabled=true"
       - "ofelia.job-exec.optimize.schedule=@every 23h"
       - "ofelia.job-exec.optimize.command=php -dmemory_limit=-1 /web/app/console.php index:optimize"
       - "ofelia.job-exec.optimize.no-overlap=true"

Another project has also an optimize step and because of that, named it "optimize" as well.

There is no error message in ofelia, that this is a problem, but the log is rather strange, if you do so. The jobs are kind of overwriting themselves and it is not clear, which job is executed and which one is basically dead.

If all jobs would be "scoped" to the container, they couldn't overwrite each other and it would prevent any name collision between independent projects. So maybe ofelia could (internally) add the container ID or name to the job-exec name. So if the container is called "gitlab" and the ofelia jobs-exec is called "optimize" make it (internally) "gitlab-optimize" or so.