Fixing docker daemon setup for Ubuntu
I found that the location of systemd service config file in Ubuntu 16.04 is not in
usr/lib/systemd/system/docker.service
So, I change current path in setup_worker_docker.md file.
(https://gerrit.hyperledger.org/r/#/c/28003/)
I tested in Ubuntu 16.04.5 LTS
@@ -26,7 +26,7 @@ ExecStart=/usr/bin/dockerd -H fd:// -H unix:///var/run/docker.sock -H tcp://0.0.
```
#### Ubuntu 16.04
-Edit systemd service config file `usr/lib/systemd/system/docker.service`, update the `ExecStart` line under section `[Service]`, as the following:
+Edit systemd service config file `/lib/systemd/system/docker.service`, update the `ExecStart` line under section `[Service]`, as the following:
```
[Service]
