exa2pro/starpu-max: porting work to Maxeler DFE @ df6757bf98423deadcd67ffa007f90ed6de8ff5c

Andra Hugo 127e19b535 add iterating over all contexts at pop time when blocked_workers are alowed		12 lat temu
..
dummy_sched_with_ctx.c	5fa6ed1bb7 allow passing the pointer of a scheduler to a context	12 lat temu
parallel_code.c	b227dbcfdc Use STARPU_ATTRIBUTE_* macros	12 lat temu
sched_ctx.c	127e19b535 add iterating over all contexts at pop time when blocked_workers are alowed	12 lat temu