commit de1e8c7bfe7c875ea284b55040e8f3cd3a56fcc2
Author: Abhinav Sharma <abhinavsharma@fb.com>
Date:   Thu Aug 23 14:34:39 2018 -0700

    Log updates to semi-sync whitelist in the error log

    Summary:
    Plugin variable changes are not logged in the error log even when
    log_global_var_changes is enabled. Logging updates to whitelist will help in
    debugging.

    Reviewed By: guokeno0

    Differential Revision: D9483807

    fbshipit-source-id: e111cda773d