Description of problem:
# bkr | grep list
  distro-trees-list              List distro trees
  distros-list                   list distros
  job-list                       List Beaker jobs
  list-labcontrollers            list labcontrollers
  list-systems                   List systems
  task-list                      List tasks in Beaker's task library

As a new users, firstly I try to use "distros-list", it works, very good. But just after type "systems-list", no this command, it's actually "list-systems".
So suggest to make the command syntax style consistence, adjust "list-XXXX" to "XXXX-list".

Version-Release number of selected component (if applicable):
beaker-release-0.15


How reproducible:
100%

Steps to Reproduce:

Actual results:


Expected results:



Additional info:
this is just a cosmetic issue.