fix situations where cluster nodes can have different btls
Fixed by Roman, reviewed by Igor, Mike
cmr=v1.7.5:reviewer=ompi-rm1.7
This commit was SVN r30877.
2. Oshmem examples moved to 'mpi' build target.
3. Oshmem examples renamed as 'shmem' => 'oshmem'.
4. Fixed warnings in oshmem_info.
Refs: 3763
This commit was SVN r29663.