Be more selective about closing fd's for the alps odls
component. Don't close fd's of pipes set up by the
apshepherd for providing RDMA credentials, etc.
Add an entry to the help file in case
alps_app_lli_pipes returns an error.
It turns out that the support for Open MPI apps on
Cray was hanging on a thin thread of support when
using the mpirun job launcher. It just happened that
with a certain set of configuration options things would
work. This is bound to backfire at some point.
To fix this weakness, as well as to allow for mpirun launched
jobs to benefit from many of the advanced placement features
provided by the Cray Linux Environment (as opposed to the hwloc
only default env of orte), a new odls alps component is introduced.
