Refs #6041: Backport technique from branch 3.0
Fixes #6041: Implement rpmPackageInstallation post hook commands and working update
Merge pull request #621 from peckpeck/bug_6041/implement_rpmpackageinstallation_post_hook_commands_and_working_update

Fixes #6041: Implement rpmPackageInstallation post hook commands and working update