model reorg: move EDF priority definition to model.priority

...ing/analysis/edf/rta/nonpr_reg/concrete_models/floating.v

...ring/analysis/edf/rta/nonpr_reg/concrete_models/limited.v

...nalysis/edf/rta/nonpr_reg/concrete_models/nonpreemptive.v

...g/analysis/edf/rta/nonpr_reg/concrete_models/preemptive.v

...ucturing/analysis/edf/rta/nonpr_reg/response_time_bound.v

restructuring/analysis/edf/rta/response_time_bound.v

restructuring/model/priority/edf.v