Description of problem:
Started docker-latest daemon will start docker-containerd and docker-rhel-push-plugin, but after stopped docker-latest, the other two are still running which caused some problem later on like docker runtime data is still in-use.

# systemctl stop docker-latest

# rm -rf /var/lib/docker-latest/*
rm: cannot remove ‘/var/lib/docker-latest/overlay/dfda124510be24a732abca4b104cc17b7413c3766ddb0972d8dad8fd126fd011/merged’: Device or resource busy

# ps aux | grep docker
root      11533  0.0  0.0  42772  6984 ?        Ssl  Aug11   0:00 /usr/libexec/docker/rhel-push-plugin
root      11956  0.0  0.1 732948 15232 ?        Ssl  Aug11   0:25 /usr/libexec/docker/docker-containerd --listen /run/containerd.sock --runtime /usr/libexec/docker/docker-runc --runtime-args --systemd-cgroup=true

# systemctl stop docker-containerd
# systemctl stop rhel-push-plugin
Warning: Stopping rhel-push-plugin.service, but it can still be activated by:
  rhel-push-plugin.socket

# rm -rf /var/lib/docker-latest/*

Version-Release number of selected component (if applicable):
docker-selinux-1.10.3-46.el7.10.x86_64
docker-common-1.10.3-46.el7.10.x86_64
docker-1.10.3-46.el7.10.x86_64
docker-rhel-push-plugin-1.10.3-46.el7.10.x86_64
docker-latest-1.12.0-4.el7.x86_64

How reproducible:
always