pkg.m4: "Open MPI", not "OpenMPI" :-)
opal_check_pmi.m4: trivial whitespace cleanup; no code changes
OSHMEM: spml ikrit: disable rdmap op DCI pool

Instead use single pool for both rdma and send receive ops.
OSHMEM: spml ikrit: disable rdmap op DCI pool

Instead use single pool for both rdma and send receive ops.
Merge branch 'master' of github.com:open-mpi/ompi

Conflicts:
	oshmem/mca/spml/ikrit/spml_ikrit_component.c
Don't open PSM context when run on single node

When running many ranks on a single node using PSM, it's possible to
exhaust the network hardware contexts (there are 16).  This patch checks
if only a single node is being used. If so, the 'ipath' component of PSM
is disabled and no hardware contexts are opened.
opal_check_ident.m4: make the test match what we do in the code base

Per #257, the configure test used to check:

```c
```

But out in the code base, we actually do this:

```c
// ...
```

This commit updates the configure test to ```#define``` a string and
then use that with the various ident strategies.

Fixes #257
Update the grpcomm direct component's priority so it sits at the bottom of the list, as it should now that the other components are active. Cleanup up the signature print function a touch to make it more readable. Remove the unneeded xcast functions in brks and rcd components as we will just fall thru to using the "direct" one