new_contents: def test_checking_nova_compute(local_salt_client):
      service_info = local_salt_client.cmd(
          'cpu*', 
          'cmd.run', 
         ['service nova-compute status'])
  
      computes_no_availability = []
  
      for node in service_info:
          if not 'nova-compute start/running,' in service_info[node]:
              computes_no_availability.append(node)
  
      assert not computes_no_availability, \
          "Nodes where nova-compute isn't started: {}".format(computes_no_availability)
  
subject: add test_check_computes_availability.py (#17)