Duplicated info messages when running in parallel

[KulaginVladimir]

When a simulation is run in parallel with mpirun, info messages (e.g. here, here, etc.) are printed by each rank.

Before #731, a simple solution can be to call print if fenics.MPI.comm_world.rank == 0.

[KulaginVladimir]

@RemDelaporteMathurin, do we have instructions on how to run in parallel?

[RemDelaporteMathurin]

No we don't!

[KulaginVladimir]

@RemDelaporteMathurin, do we need this issue if we have #731?

[RemDelaporteMathurin]

@KulaginVladimir I see these two issues are separate for now as one is just for parallel and the other is more general and also applies to serial

[KulaginVladimir]

@RemDelaporteMathurin. So, you'd keep both? This one is simpler and can help us to temporarily improve the behaviour (info, erros, etc) in parallel

[RemDelaporteMathurin]

Agreed!