(#6326) use next(it) rather than it.next()
(#6326) use next(it) rather than it.next()

As with 952045413: in python3 it's it.__next__(), but next(it) is
correct for both.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor