Adding information to ps tables

[PawelPlesniak]

Requires DUNE-DAQ/druncschema#33
Summary

• Defined a command get_detector_name in controller/utils.py
• Changed the format of the commands printed at the end of status to be CLI aligned (i.e. with - not _)
• Changed the return types of commands in controller/controller_driver.py
• Defined a describe method for children nodes. Not necessary for this PR but as we're going to move from REST to gRPC for all communications figured it would be good to have it there.
• Split off propagate_fsm_command in rest_api_child and defined describe in ChildNode that parses the configuration and environment to fill Description. This may need chaning depending on whether we want there to be interaction with the daq_application itself to populate Description.
• Added the configuration into the base descriptor for ChildNode

[plasorak]

Thanks Pawel, this looks good. I have a couple of comments, but otherwise this looks good. The one with about zip seem to be the most critical, as it sometimes leads to incorrectly assigning the info to the wrong app.