documented DeliverOrderResult returned attributes, phpdoc
added documentation for INTG-462
added validation unit tests for WebPayAdmin::creditOrderRows()->creditInvoiceOrderRows()
added missing validation unit tests for WebPayAdmin::creditOrderRows, added TODO items for missing WebPayAdmin entrypoint methods
fixed failing tests, removed redundant tests
Merge branch 'intg-462' into develop
HostedAdminRequests Annul, Confirm, Credit, LowerAmount now returns the Svea transactionId in their respective response classes.
Merge branch 'INTG-461' into develop