Fixes #4851: Move r32498 to v1.8 branch (Fix r32460 race condition resolution)

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r32498 [[BR]]
Fix r32460 race condition resolution when procs call MPI_Abort.

do not invoke orte_session_dir_finalize(...) so
orte_ess_base_app_abort(...) can successfully createi
<orte_process_info.proc_session_dir>/aborted

cmr=v1.8.2:reviewer=rhc
Fixes #4852: Move r32500 to v1.8 branch (silence warnings)

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r32500 [[BR]]
silence warnings

gcc 3.4.3 on solaris 10 issues some warnings

cmr=v1.8.2:reviewer=hjelmn