Get rid of unnecessary use of long.
Get rid of unnecessary use of long.

Python 2.7 will do all the necessary conversion to long if required.
Get rid of Python 3 compatibility stuff as well.

This is the last of explicit use of long in blivet.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

vpodzime/blivet,dwlehman/blivet,dwlehman/blivet,rhinstaller/blivet,rvykydal/blivet,rhinstaller/blivet,vojtechtrefny/blivet,vpodzime/blivet,jkonecny12/blivet,vojtechtrefny/blivet,AdamWill/blivet,AdamWill/blivet,rvykydal/blivet,jkonecny12/blivet