Request configurations when needed during server-side actions rather than rely on configuration data from the execution command

Request configurations when needed during server-side actions rather than rely on configuration data from the execution command.

Due to a recent change, which appeared to remove configuration data from the execution command JSON document, data needed for Kerberos-related service-side actions is missing. This data may be requested when needed from the cluster data at the time of execution rather than when setting up the stages.