Bug: docker service doesn't start on centos-7

Summary

Using docker role (version 1.1.0) on centos-7 doesn't work properly. In current version docker doesn't start.

Steps to reproduce

1. Use role docker to install docker service on CentOS 7 machine.
2. Check systemctl status docker.service.

Expected behavior

Docker service should start.

Actual behavior

Starting docker service fails.

Relevant logs and/or screenshots

● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
  Drop-In: /etc/systemd/system/docker.service.d
           └─settings.conf
   Active: failed (Result: exit-code) since śro 2017-03-01 08:34:34 UTC; 6s ago
     Docs: https://docs.docker.com
  Process: 3427 ExecStart=/usr/bin/dockerd -H fd:// --mtu=1450 --storage-driver=overlay (code=exited, status=1/FAILURE)
 Main PID: 3427 (code=exited, status=1/FAILURE)

mar 01 08:34:33 rundeck systemd[1]: Starting Docker Application Container Engine...
mar 01 08:34:34 rundeck dockerd[3427]: no sockets found via socket activation: make sure the service was started by systemd
mar 01 08:34:34 rundeck systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
mar 01 08:34:34 rundeck systemd[1]: Failed to start Docker Application Container Engine.
mar 01 08:34:34 rundeck systemd[1]: Unit docker.service entered failed state.
mar 01 08:34:34 rundeck systemd[1]: docker.service failed.

Possible fixes

Remove parameter -H fd:// from template settings.conf.j2 in docker role. Proposed solution has been tested on Ubuntu Xenial and Yakety - works great.