* Added new tests validating gotcha wrappers
* Update MPI example to use thread
* Tweaks to mpi-flat test and mpi_gotcha
- enabled MPI_Comm_size and MPI_Comm_rank in mpip so disabled them at runtime
- set test to collapse threads and processes
* Tweak to test and example
- mpi test sets GOTCHA_DEBUG=1 in env
- removed checking for MPI_{Comm_dup,Comm_group,Group_incl}
- tweaked tests so pthread_join is where it is expected
Jonathan R. Madsen
b1191b2831