Issue 49349 - global name 'imap' is not defined
    
    Bug Description:
    When stacktrace is generated, gdb helper script throws exception and
    doesn't produce any output for threads.
    
    Fix Description:
    Use the correct namespace for imap function.
    
    https://pagure.io/389-ds-base/issue/49349
    
    Reviewed by: mreynolds (Thanks!)