adding tests for dist in single PDM and updating the one of multi PDM
adding tests for dist in single PDM and updating the one of multi PDM

Signed-off-by: Sylvain Chevallier <d115dbaca926e1b13dac5ad9e4d7418855613cfa@uvsq.fr>

nkoep/pymanopt,nkoep/pymanopt,pymanopt/pymanopt,nkoep/pymanopt,pymanopt/pymanopt