Sensitive image location != image.filepath

[jduss4]

Note for future sprints, once sensitive images are relocated on the filesystem, the image model filepath will no longe be accurate for these files. It would not be difficult to add a conditional checking if the path should be different, but this was not implemented for now because there is no need to view those images through the app. In the event that a second website is created for internal viewing of sensitive images, this filepath will need to be updated (and apache permissions altered).