Adds jnlp removal via defer. Changes to start()

Some changes to make sure & more quickly remove the jnlp file. Adds a
delay option since we don't wait for the javaws to run & exit, but
continue on our own, we delay a few seconds then before exiting to give
javaws to start up & read the jnlp file
Merge branch 'faster_file_delete' of https://github.com/glennsb/drac-kvm into glennsb-faster_file_delete

Conflicts:
	main.go
Merge branch 'glennsb-faster_file_deletet push origin master'