Log Message:
Update to OpenMPI 1.6.2
Don't build VampirTrace anymore, it will be introduced as separate package.

Changes in v1.6.2 as compared to v1.6.1:

- Fix issue with MX MTL. Thanks to Doug Eadline for raising the issue.
- Fix singleton MPI_COMM_SPAWN when the result job spans multiple nodes.
- Fix MXM hang, and update for latest version of MXM.
- Update to support Mellanox FCA 2.5.
- Fix startup hang for large jobs.
- Ensure MPI_TESTANY / MPI_WAITANY properly set the empty status when
  count==0.
- Fix MPI_CART_SUB behavior of not copying periods to the new
  communicator properly. Thanks to John Craske for the bug report.
- Add btl_openib_abort_not_enough_reg_mem MCA parameter to cause Open
  MPI to abort MPI jobs if there is not enough registered memory
  available on the system (vs. just printing a warning). Thanks to
  Brock Palen for raising the issue.
- Minor fix to Fortran MPI_INFO_GET: only copy a value back to the
  user's buffer if the flag is .TRUE.
- Fix VampirTrace compilation issue with the PGI compiler suite.