Updated hrsc2isis error messages when ingesting a map projected image and when...

Updated hrsc2isis error messages when ingesting a map projected image and when trying to ingest an image that is not an hrsc image.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@7317 41f8697f-d340-4b68-9986-7bafba869bb8