[IMP] base, res_currency: added an indirection on _current_rate() function to allow a clean overwriting
[IMP] base, res_currency: added an indirection on _current_rate() function to allow a clean overwriting
MarkusTeufelberger/openobject-server,MarkusTeufelberger/openobject-server,MarkusTeufelberger/openobject-server