invoice: use new execute API in DefaultInvoiceDao

This lets use remove WithInvoiceApiException in DefaultInvoicePaymentApi.

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
invoice: use new execute API in DefaultInvoiceDao

This lets use remove WithInvoiceApiException in
DefaultInvoiceInternalApi.

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
invoice: use new execute API in DefaultInvoiceDao

Use the new API when expecting a checked exception.

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>