add deposit and subscription boolean to ledger_item#to_invoicing_export

(related #188)

app/models/invoice.rb

@@ -465,7 +465,6 @@ class Invoice < InvoicingLedgerItem
   def to_invoicing_export
     return super.merge({
       # recipient: handled in subclasses
-      deposit: self.deposit?,
       payment_method: payment_method
     })
   end

app/models/invoicing_ledger_item.rb

@@ -55,6 +55,8 @@ class InvoicingLedgerItem < ActiveRecord::Base
       tax_amount: self.tax_amount.to_f,
       line_items: self.line_items.order(:id).each.map(&:to_invoicing_export),
       description: self.description,
+      deposit: self.deposit,
+      subscription: self.subscription,
     }
     # sender and recipient should be defined in subclass
     return result

spec/models/member_credit_note_spec.rb

@@ -86,6 +86,7 @@ describe MemberInvoice do
         net_amount: 0.0,
         line_items: [],
         deposit: false,
+        subscription: false,
         payment_method: "direct_debit"
       })
     end

spec/models/member_invoice_spec.rb

@@ -140,6 +140,7 @@ describe MemberInvoice do
         net_amount: 0.0,
         line_items: [],
         deposit: false,
+        subscription: false,
         payment_method: "direct_debit"
       })
     end