Ping endpoints apidoc should be explicit
This is required to save backwards compatibility of usage ping endpoint in hammer.
Since hammer commands rely on API documentation there appears a problem if we suddenly change resource documentation. E.g. previously hammer ping command came from hammer-cli-katello plugin and used :ping resource which was defined in Katello plugin. But due to some changes Katello has now :katello_ping resource and thus older versions of hammer-cli-katello plugin will not work.