ipaserver/dcerpc: avoid logging stack trace in retrieve_anonymously
If an error occured when searching foc a DC a stack trace was logged,
and execution was aborted.
This patch allows execution to continue and log the error message that
caused the 'finddc' do fail.
Fixes: https://pagure.io/freeipa/issue/9484
Related: https://issues.redhat.com/browse/RHEL-12149
Signed-off-by: Rafael Guterres Jeffman <rjeffman@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>