* update go generated code comment
* update samples for go petstore
* update code generation comment
* update samples for go petstore
* Trigger CI due to previous Shippable race condition
* add -DwithGoCodegenComment=true option
* reset samples
* add withGoCodegenComment=true to bin/go-petstore-withxml.sh
* update samples/.../go-petstore-withXml using -DwithGoCodegenComment=true
* Added support for application/xml content-type for GO language
Issue #7463
* Added test scripts for Go lang "withXml" feature
* Added samples for Go land "withXml" feature.
* "withXml" feature for Go language is only available for client.