Out of date Lucene index causes pt search failure if pt deleted

If a patient is deleted and Lucene isn't reindexed, patientSearchWidget will crash, leaving a spinning wheel on the screen and an error in the dev console.

This happens because the API returns a result for that deleted person (presumably with the data from Lucene), but when it doesn't find database entries for that person it simply puts in `null`. An error is thrown when the frontend attempts to reference a property of that null object.

Instead, the server should exclude the search result and log an informative WARNING (including patient ID and a suggestion to reindex Lucene).