add spring-boot-file-delegate-optional FILES

Author: jpfinne

samples/server/petstore/springboot-file-delegate-optional/.openapi-generator/FILES

@@ -0,0 +1,12 @@
+README.md
+pom.xml
+src/main/java/org/openapitools/OpenApiGeneratorApplication.java
+src/main/java/org/openapitools/RFC3339DateFormat.java
+src/main/java/org/openapitools/api/ApiUtil.java
+src/main/java/org/openapitools/api/DummyApi.java
+src/main/java/org/openapitools/api/DummyApiDelegate.java
+src/main/java/org/openapitools/configuration/HomeController.java
+src/main/java/org/openapitools/configuration/SpringDocConfiguration.java
+src/main/resources/application.properties
+src/main/resources/openapi.yaml
+src/test/java/org/openapitools/OpenApiGeneratorApplicationTests.java