fixes #11249 - return katello list command

[stbenjam]

EL6

# ./katello-service list
elasticsearch   0:off   1:off   2:on    3:on    4:on    5:on    6:off
foreman-proxy   0:off   1:off   2:on    3:on    4:on    5:on    6:off
foreman-tasks   0:off   1:off   2:on    3:on    4:on    5:on    6:off
httpd           0:off   1:off   2:on    3:on    4:on    5:on    6:off
mongod          0:off   1:off   2:on    3:on    4:on    5:on    6:off
pulp_workers    0:off   1:off   2:on    3:on    4:on    5:on    6:off
qpidd           0:off   1:off   2:on    3:on    4:on    5:on    6:off
tomcat6         0:off   1:off   2:on    3:on    4:on    5:on    6:off

EL7

# ./katello-service list
foreman-proxy.service                       enabled 
foreman-tasks.service                       enabled 
httpd.service                               enabled 
mongod.service                              enabled 
pulp_celerybeat.service                     enabled 
pulp_resource_manager.service               enabled 
pulp_workers.service                        enabled 
qdrouterd.service                           enabled 
qpidd.service                               enabled 
tomcat.service                              enabled 
elasticsearch   0:off   1:off   2:on    3:on    4:on    5:on    6:off

[ehelms]

ACK