fixed bug where constant collapse operators were not combined with constant H term if both H and c_op_list have string-based time dependence.
fixed bug where constant collapse operators were not combined with constant H term if both H and c_op_list have string-based time dependence.

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