Leave your config Path as config_path: /srv/homeassistant/src/open-zwave-control-panel/config
You can manually edit the name of anything by (1) Using Customize or (2) Shutting down HA and editing the zwcfgXXXX.xml file in /home/homassistant/.homeassistant. If you edit the zwcfgXXXX.xml file, search for name= and location= parameters. The reason why you have to shut down HA, is that HA writes to this file before it shuts down and that will undo your changes.
Another way you can do it, is when you are in the Zwave Control panel, thee is a Name option, which names the nodes and optionally the location. After you are done naming them in ZWCP, click on save, and the zwcfgxxx.xml file that is generated then would need to be copied to /home/homeassistant/.homeassistant/ so that HA can pick up on the changes you made in zwcp.