When a service/host is disabled, the resulting summary message states
that a Kerberos key was disabled. However, Kerberos key may not have
been enabled before this command at all, which makes this information
confusing for some users. Also, the summary message didn't state
that an SSL certificate was disabled too.
This patch rather changes the summary message to a standard phrase
known from other plugins disable command and states all disable
command steps in a respective command help.
https://fedorahosted.org/freeipa/ticket/872