changing references of gluster to swiftonfile

As part of changing the project name from gluster-swift to swiftonfile, we are updating references of gluster to swiftonfile where it makes sense
yeah, i think we always tried to do that for gluster-swift and should continue doing the same for swiftonfile. I think once we are done with this changes needed to make swiftonfile be a SP we can have a release and call it 2.0.0