Make return statement always present

Author: rpanackal

datamodel/openapi/openapi-generator/src/main/resources/openapi-generator/mustache-templates/libraries/apache-httpclient/api.mustache

@@ -175,7 +175,7 @@ public class {{classname}} extends BaseApi {
         {{#vendorExtensions.x-return-nullable}}@Nullable{{/vendorExtensions.x-return-nullable}}{{^vendorExtensions.x-return-nullable}}@Nonnull{{/vendorExtensions.x-return-nullable}}
         public {{#returnType}}{{{returnType}}} {{/returnType}}{{^returnType}}OpenApiResponse {{/returnType}}{{#vendorExtensions.x-sap-cloud-sdk-operation-name}}{{vendorExtensions.x-sap-cloud-sdk-operation-name}}{{/vendorExtensions.x-sap-cloud-sdk-operation-name}}{{^vendorExtensions.x-sap-cloud-sdk-operation-name}}{{operationId}}{{/vendorExtensions.x-sap-cloud-sdk-operation-name}}({{#requiredParams}}{{>nullable_var_annotations}} final {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/requiredParams}}) throws OpenApiRequestException {
         {{#hasOptionalParams}}
-            {{#returnType}}return {{/returnType}}{{#vendorExtensions.x-sap-cloud-sdk-operation-name}}{{vendorExtensions.x-sap-cloud-sdk-operation-name}}{{/vendorExtensions.x-sap-cloud-sdk-operation-name}}{{^vendorExtensions.x-sap-cloud-sdk-operation-name}}{{operationId}}{{/vendorExtensions.x-sap-cloud-sdk-operation-name}}({{#hasRequiredParams}}{{#requiredParams}}{{paramName}}{{^-last}}, {{/-last}}{{/requiredParams}}, {{/hasRequiredParams}}{{#optionalParams}}null{{^-last}}, {{/-last}}{{/optionalParams}});
+            return {{#vendorExtensions.x-sap-cloud-sdk-operation-name}}{{vendorExtensions.x-sap-cloud-sdk-operation-name}}{{/vendorExtensions.x-sap-cloud-sdk-operation-name}}{{^vendorExtensions.x-sap-cloud-sdk-operation-name}}{{operationId}}{{/vendorExtensions.x-sap-cloud-sdk-operation-name}}({{#hasRequiredParams}}{{#requiredParams}}{{paramName}}{{^-last}}, {{/-last}}{{/requiredParams}}, {{/hasRequiredParams}}{{#optionalParams}}null{{^-last}}, {{/-last}}{{/optionalParams}});
         {{/hasOptionalParams}}
         {{^hasOptionalParams}}
             {{>operationBody}}