Driver overlay failed to remove root filesystem (docker 17.05)

[jcvenegas]

Somethimes running functional test I get a message error from `docker rm -f, this happen with docker 17.05

# Error response from daemon: Driver overlay failed to remove root filesystem d0b96e13643c875ed40da2539da0092c3c157b9952f6684027796f5e63a40902: remove /var/lib/docker/overlay/df04ee38ab7f3ea9fa25d20576532d9c7bf4b950ab99c3e965272abe2aaee9d9/merged/bin: directory not empty

Probably related with #795

[jcvenegas]

@sboeuf are you seeing this behavior in 3.0 ?

[sboeuf]

Nope I haven't seen this error in 3.0, but I am not testing with 17.05 currently.