Fixed issue when deleting servers. The Jabox was holding files (missing close of FileInputStream) preventing the removal of some files.

Problem reported on this topic: https://groups.google.com/forum/#!topic/users-jabox/VFHX4uZ5mJQ

Revised all locations that used FileInputStream.

I used the command "IOUtils.closeQuietly" to be a simpler implementation. As discussed here: http://stackoverflow.com/questions/156508/closing-a-java-fileinputstream