If there is an exception generating a proxy, throw it instead of not passing it on.
If there is an exception generating a proxy, throw it instead of not passing it on.

Also tweaked text of error message.

apigee/wsdl2apigee,srinandan/wsdl2apigee,srinandan/wsdl2apigee,apigee/wsdl2apigee,apigee/wsdl2apigee