Comment 2 for bug 410293

The import succeeds, but the script stops at that point. If this happens a lot, the effect will be to slow down the imports. Worst case, the script processes only 1 file per run. Not too far from what we've been seeing.

As it turns out, the set of contact addresses for a person may be empty. All that's needed is to suppress the sending of email from ImportProcess.run() in that case.