Add ChecksumValidationException and IntString map
Add fields to FILESET_UPLOAD_END event
Update ImportLibrary.importImage() upload logic

This commit changes the order in which events are sent to observers
and image checksum verification takes place. This allows for
abusing a single event in the case of a failed and successful upload.
Change the way verifyUpload() throws exceptions
Update Insight code to display checksums
Update ImportException to handle CVE