''docker-compose logs'' does not show logs for new containers

[aleksandr-vin]

How to reproduce:

shell 1> docker-compose scale xxx=1
shell 2> docker-compose logs xxx
shell 1> docker-compose scale xxx=2
shell 1> (make xxx service produce logs in second container)

expected: shell 2 must show ''xxx_2 | ..." logs as well

[dnephin]

Note: this issues applies to:

• containers created by scale
• containers restarted by a restart policy
• containers manually started or restarted by a user

I have a proposal in #1866 that should make this work