[Ocfs2-test-devel] ocfs2-test: Finish openmpi migration

[Marcos Matsunaga]

I'm resending these patches and some additional ones. 

Completing the migration to openmpi.

Difference from the original:

1. Added suggestions from Tristan to validate mpirun return codes.
2. Patch to fix the config.sh/config.py files when building RPMs.
3. Added validation of mpirun return codes to open_delete.py and
   run_lvb_torture.py

Signed-off-by: Marcos Matsunaga <Marcos.Matsunaga at oracle.com>