Overflow issue when adding big files

[diasf]

When adding a big file an integer overflow occurs resulting in the following exception:

dataverse-dev-glassfish  | Caused by: java.lang.NegativeArraySizeException
dataverse-dev-glassfish  |      at edu.harvard.iq.dataverse.ingest.IngestableDataChecker.detectTabularDataFormat(IngestableDataChecker.java:593)
dataverse-dev-glassfish  |      at edu.harvard.iq.dataverse.datafile.FileTypeDetector.detectTabularFileType(FileTypeDetector.java:152)
dataverse-dev-glassfish  |      at edu.harvard.iq.dataverse.datafile.FileTypeDetector.determineFileType(FileTypeDetector.java:69)
dataverse-dev-glassfish  |      at edu.harvard.iq.dataverse.datafile.FileTypeDetector$Proxy$_$$_WeldClientProxy.determineFileType(Unknown Source)
dataverse-dev-glassfish  |      at edu.harvard.iq.dataverse.datafile.DataFileCreator.createDataFiles(DataFileCreator.java:89)
dataverse-dev-glassfish  |      at edu.harvard.iq.dataverse.datafile.DataFileCreator.createDataFiles(DataFileCreator.java:75)

A regression resulting from PR #2591