Singleton Spawn tests

[jjhursey]

No description provided.

[jjhursey]

Expected output:

shell$ ./run.sh 
=====================
Testing: Hello with mpirun
=====================
  0/  1) [f5n18] 2394664 Hello, world!
=====================
Testing: Hello as a singleton
=====================
  0/  1) [f5n18] 2394751 Hello, world!
=====================
Testing: MPI_Comm_spawn with mpirun
=====================
Spawning './simple_spawn' ... OK
=====================
Testing: MPI_Comm_spawn as a singleton
=====================
Spawning './simple_spawn' ... OK
=====================
Testing: MPI_Comm_spawn_multiple with mpirun
=====================
Hello from a Child (A)
Hello from a Child (B)
Hello from a Child (B)
Spawning Multiple './simple_spawn_multiple' ... OK
=====================
Testing: MPI_Comm_spawn_multiple as a singleton
=====================
Hello from a Child (A)
Hello from a Child (B)
Hello from a Child (B)
Spawning Multiple './simple_spawn_multiple' ... OK
=====================
Success
=====================