Update to reset httpRepsonse.Body (#6948)

* Update to reset httpRepsonse.Body such that is available to client consumers via the returned httpResponse variable.

* update samples

Co-authored-by: William Cheng <[email protected]>

Author: nmische

modules/openapi-generator/src/main/resources/go/api.mustache

@@ -7,6 +7,7 @@ import (
 	_ioutil "io/ioutil"
 	_nethttp "net/http"
 	_neturl "net/url"
+	_bytes "bytes"
 {{#imports}}	"{{import}}"
 {{/imports}}
 )
@@ -309,6 +310,7 @@ func (a *{{{classname}}}Service) {{{nickname}}}(ctx _context.Context{{#hasParams
 
 	localVarBody, err := _ioutil.ReadAll(localVarHTTPResponse.Body)
 	localVarHTTPResponse.Body.Close()
+	localVarHTTPResponse.Body = _ioutil.NopCloser(_bytes.NewBuffer(localVarBody))
 	if err != nil {
 		return {{#returnType}}localVarReturnValue, {{/returnType}}localVarHTTPResponse, err
 	}

samples/client/petstore/go/go-petstore-withXml/api_another_fake.go

@@ -14,6 +14,7 @@ import (
 	_ioutil "io/ioutil"
 	_nethttp "net/http"
 	_neturl "net/url"
+	_bytes "bytes"
 )
 
 // Linger please
@@ -78,6 +79,7 @@ func (a *AnotherFakeApiService) Call123TestSpecialTags(ctx _context.Context, bod
 
 	localVarBody, err := _ioutil.ReadAll(localVarHTTPResponse.Body)
 	localVarHTTPResponse.Body.Close()
+	localVarHTTPResponse.Body = _ioutil.NopCloser(_bytes.NewBuffer(localVarBody))
 	if err != nil {
 		return localVarReturnValue, localVarHTTPResponse, err
 	}