It is important to use the validation tool to ensure the WSDL conforms to the standards, otherwise problems will arise during the creation of the server code from the Axis2 tool.
There should only be one warning: "WS-I: (BP2120) A binding has operations that are not unique. BookLegacy.wsdl /wsdl/wsdl line 81 WSDL Problem".
This is an incorrectly presented message that indicates there are multiple operations which have the same parameter types. It is not an issue for this application and the warning can be ignored. See Eclipse Bug 70481 for more information.
This completes the creation of the WSDL. It will be used later to generate the server side code.