Portainer: feat(services) - Add Logs

[WTFKr0]

Add a Logs link in service detail view
Like the logs for a container, docker API >= 1.25 allow to get logs for a service (from all containers in all nodes)
See https://docs.docker.com/engine/api/v1.25/#operation/ServiceLogs
I think the portainer log view for container can be reused (displaying stdout and stderr with autorefresh)

[richardgoater]

would love to see this picked up again now that service logs is stable in Docker 17.05. Would it just be a case of reverting the revert?

[deviantony]

We will have a look to merge this in 1.13.x !

[deviantony]

@richardgoater seems that we're hitting some bugs in 17.05, we should wait for 17.06.

See #671

[richardgoater]

thanks @deviantony.