revert tolerance increase in testPositionControlGradients and fix numerical gradient bug by using only the path solver
revert tolerance increase in testPositionControlGradients and fix numerical gradient bug by using only the path solver

tkoolen/drake,edowson/drake,sheim/drake,astrorog/drake,tkoolen/drake,astrorog/drake,manuelli/drake,hanssusilo/drake,scottviteri/drake,billhoffman/drake,thientu/drake,billhoffman/drake,crogers3/drake,crogers3/drake,billhoffman/drake,crogers3/drake,sheim/drake,thientu/drake,thientu/drake,psiorx/drake,psiorx/drake,psiorx/drake,thientu/drake,sheim/drake,tkoolen/drake,astrorog/drake,edowson/drake,sheim/drake,hanssusilo/drake,psiorx/drake,scottviteri/drake,manuelli/drake,edowson/drake,hanssusilo/drake,psiorx/drake,edowson/drake,scottviteri/drake,tkoolen/drake,astrorog/drake,sheim/drake,hanssusilo/drake,billhoffman/drake,edowson/drake,manuelli/drake,sheim/drake,manuelli/drake,hanssusilo/drake,sheim/drake,edowson/drake,billhoffman/drake,astrorog/drake,crogers3/drake,edowson/drake,hanssusilo/drake,billhoffman/drake,manuelli/drake,tkoolen/drake,edowson/drake,scottviteri/drake,thientu/drake,billhoffman/drake,astrorog/drake,crogers3/drake,scottviteri/drake,thientu/drake,scottviteri/drake,scottviteri/drake,astrorog/drake,tkoolen/drake,tkoolen/drake,crogers3/drake,psiorx/drake,hanssusilo/drake,psiorx/drake,crogers3/drake,crogers3/drake,hanssusilo/drake,manuelli/drake,thientu/drake,billhoffman/drake,psiorx/drake,manuelli/drake,sheim/drake