Fix csv output mode of nodediscover list
Fix csv output mode of nodediscover list

The changes made for tabulator broke csv output, fix that back.

jjohnson42/confluent,whowutwut/confluent,jjohnson42/confluent,whowutwut/confluent,whowutwut/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,whowutwut/confluent,xcat2/confluent,xcat2/confluent