Issue 51016 - Fix memory leaks in changelog5_init and perfctrs_init
Bug Description: Memory Leaks are detected by ASAN in changelog5_init
and perfctrs_init functions.
Fix Description: For perfctrs_init, free existing memory before initializing
new memory which will be assigned to the existing stucts.
For changelog5_init, run cl5Cleanup instead of cl5Close for BE preop.
https://pagure.io/389-ds-base/issue/51016
Reviewed by: lkrispen (Thanks!)