Ticket 623 - cleanAllRUV task fails to cleanup config upon completion
Bug description: coverity reported "13158 - Logically dead code'
Fix description: csn_as_string returns allocated csn string,
which needs to be reassigned to csnstr.
https://fedorahosted.org/389/ticket/623
Reviewed by Nathan (Thank you!!)
(cherry picked from commit d5fe6ba773ef2655845df5152901fd5bb6a9d4e9)