[cxxmodules] Move curand_discrete and remove curand_poisson.
[cxxmodules] Move curand_discrete and remove curand_poisson.

This should fix the cuda failures.

karies/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,karies/root,karies/root,karies/root,olifre/root,olifre/root,root-mirror/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root