uninstall -v: remove Tracebacks
ipa-server-install --uninstall -v -U prints Traceback in its log file.
This issue happens because it calls subprocess.Popen with close_fds=True
(which closes all file descriptors in the child process)
but it is trying to use the file logger in the child process
(preexec_fn is called in the child just before the child is executed).
The fix is using the logger only in the parent process.
Fixes: https://pagure.io/freeipa/issue/7681
Reviewed-By: Rob Crittenden <rcritten@redhat.com>