travis fix #6 - older ubun for valgrind tests
travis fix #6 - older ubun for valgrind tests

shlomif/black-hole-solitaire,shlomif/black-hole-solitaire,shlomif/black-hole-solitaire,shlomif/black-hole-solitaire,shlomif/black-hole-solitaire,shlomif/black-hole-solitaire