etc.generate glusterd is happening after glusterd service is started

We have to generate a config file /etc/glusterfs/glusterd.vol so that we can change the gluster metadata working directory to /var/db/system/glusterd (on the system dataset).

The /etc/glusterfs/glusterd.vol is being generated correctly, however, the service is still pointing to the default working directory location /var/lib/glusterd.

This tells me that the service is starting before we generate that file. This ticket is to

1. generate that file before we start the service
or
2. restart the service after we regenerate that file