reduce the error tolerance a bit so that the unit tests passes
reduce the error tolerance a bit so that the unit tests passes

zasdfgbnm/qutip,anubhavvardhan/qutip,cgranade/qutip,zasdfgbnm/qutip,qutip/qutip,qutip/qutip,anubhavvardhan/qutip,cgranade/qutip