TODO: don't log empty file string error

[mjames-upc]

https://github.com/Unidata/awips2-core/blob/unidata_16.4.1/edex/com.raytheon.uf.edex.distribution/src/com/raytheon/uf/edex/distribution/DistributionSrv.java#L144

TODO:

        File file = new File(bodyString);
        if (!file.exists() && bodyString.trim().length() > 0) {
            logger.error("File does not exist : " + bodyString);
            exchange.getOut().setFault(true);
        } else {
            in.setHeader("ingestFileName", file.toString());
        }

why is this triggered?