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MPICH now behaves correctly for this test. There is no reason for it to output
" No errors", since the only thing we are testing for is that it does not
timeout. We also use a non-zero error code in MPI_Abort to fit the requirements
of the test runner. Closes #1537
Signed-off-by: Pavan Balaji <balaji@anl.gov>

Use _exit instead of kill to more reliably fail processes in
fault tolerance tests. _exit ends a process immediately rather than
relying on kill/sleep combo. Also, tests now output " No Errors"
correctly upon success.
Signed-off-by: Wesley Bland <wbland@mcs.anl.gov>

Adds an FT test that attempts communication without touching a
failed process. Other changes are to use SIGKILL to simulate failures
and also to flush all output to stdout.
Signed-off-by: Wesley Bland <wbland@mcs.anl.gov>

Adds tests for when -disable-auto-cleanup is enabled and a process
dies or calls MPI_Abort. There is no communication in these cases.
Signed-off-by: Wesley Bland <wbland@mcs.anl.gov>

By setting "indent-tabs-mode:nil" we should hopefully begin to slowly
squeeze out hard tabs from the source without a disruptive (to
downstream projects) whitespace-fixing change.

No reviewer.

See the description in test/mpi/manual/README for more info.

Reviewed by balaji@.