Set a name_get method for wh_docs (IVA & ISLR)

Add this code to upgrade wh_doc (IVA & ISLR)

models: account_wh_iva & islr_wh_doc

    def name_get(self,cr, uid, ids, context):
        if not len(ids):
            return []
        res = []
        for item in self.browse(cr, uid, ids, context):
            if item.number and item.state=='done':
                res.append((item.id, '%s (%s)'%(item.number,item.name)))
            else:
                res.append((item.id, '%s'%(item.name)))
        return res