Add codestart for the server extension - issue #1021

Author: vladprado

server/integration-tests/codestarts/src/main/resources/application.properties

@@ -0,0 +1 @@
+quarkus.openapi.generator.spec=openapi.yml

server/integration-tests/codestarts/src/test/java/io/quarkiverse/openapi/server/generator/it/QuarkusOpenAPIGeneratorServerCodestartsTest.java

@@ -18,6 +18,10 @@ void testContent() throws Throwable {
         codestartTest
                 .assertThatGeneratedFile(QuarkusCodestartCatalog.Language.JAVA, "src/main/resources/application.properties")
                 .content()
-                .contains("quarkus.openapi.generator.spec=openapi_yml");
+                .contains("quarkus.openapi.generator.spec=openapi.yml");
+        //        codestartTest
+        //                .assertThatGeneratedFile(QuarkusCodestartCatalog.Language.JAVA, "src/main/resources/openapi/openapi.yml")
+        //                .content()
+        //                .contains("title: Generated API");
     }
 }

server/runtime/src/main/codestarts/quarkus/openapi-generator-codestart/java/src/main/resources/application.yml

@@ -2,4 +2,4 @@ quarkus:
   openapi:
     generator:
       spec:
-        openapi_yml
+        openapi.yml