moving old xsd validation test, which is not needed anymore, to the end of the test file
moving old xsd validation test, which is not needed anymore, to the end of the test file

domness/xero_gateway,sharesight/xero_gateway,armstrjare/xero_gateway,Thinkei/xero_gateway,BookingBug/xero_gateway,Flatbook/xero_gateway,amxsv/xero_gateway,xero-gateway/xero_gateway