[FIX] account: There is no sale_refund nor purchase_refund analytic journal

During rev. cbe2dbb, type2journal was refactored, and set as a global variable in the top of the file, as it was use everywhere accross the file.
But, in this specific method _get_journal_analytic, this type2journal dict wasn't the same as everywhere else, as you can see at rev. d2ff95f for example. We must therefore set a specific type2journal dict for this specific method.