Update default i/o files needed by CESM

(from Bill Sacks)
Call mpi_abort on stop & parallel_stop on fatal

The purpose of these changes are to call mpi abort whenever parallel_stop
is called, and to call parallel_stop rather than just stop when you call
write_log(..., GM_FATAL).

Without these changes, an error on some systems – including yellowstone
– leads to a hang rather than an abort. Thus the job stays in the
machine for the full time you have requested, leading you to be charged
a lot for a job that fails immediately.
(from Bill Sacks)