openapi functions do not work with Swagger/OpenAPI v2 #992

java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Invalid OpenAPI document

	at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
	at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2096)
	at org.acme.http.PetstoreFlowIT.petstoreWorkflowShouldReturnPetDetails(PetstoreFlowIT.java:32)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at io.quarkus.test.junit.QuarkusTestExtension.runExtensionMethod(QuarkusTestExtension.java:998)
	at io.quarkus.test.junit.QuarkusTestExtension.interceptTestMethod(QuarkusTestExtension.java:846)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.IllegalArgumentException: Invalid OpenAPI document
	at io.serverlessworkflow.impl.executors.openapi.OpenAPIProcessor.getOperation(OpenAPIProcessor.java:43)
	at io.serverlessworkflow.impl.executors.openapi.OpenAPIProcessor.parse(OpenAPIProcessor.java:38)
	at io.serverlessworkflow.impl.executors.openapi.OpenAPIExecutor.lambda$apply$1(OpenAPIExecutor.java:72)
	at io.serverlessworkflow.impl.resources.DefaultResourceLoader.lambda$load$2(DefaultResourceLoader.java:96)
	at java.base/java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1916)
	at io.serverlessworkflow.impl.resources.DefaultResourceLoader.load(DefaultResourceLoader.java:92)
	at io.serverlessworkflow.impl.executors.openapi.OpenAPIExecutor.apply(OpenAPIExecutor.java:69)
	at io.serverlessworkflow.impl.executors.CallTaskExecutor.internalExecute(CallTaskExecutor.java:58)
	at io.serverlessworkflow.impl.executors.RegularTaskExecutor.execute(RegularTaskExecutor.java:63)
	at io.serverlessworkflow.impl.executors.AbstractTaskExecutor.lambda$apply$7(AbstractTaskExecutor.java:256)
	at java.base/java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1187)
	at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2309)
	at io.serverlessworkflow.impl.executors.AbstractTaskExecutor.apply(AbstractTaskExecutor.java:256)
	at io.serverlessworkflow.impl.executors.TaskExecutorHelper.processTaskList(TaskExecutorHelper.java:42)
	at io.serverlessworkflow.impl.WorkflowMutableInstance.startExecution(WorkflowMutableInstance.java:78)
	at io.serverlessworkflow.impl.WorkflowMutableInstance.start(WorkflowMutableInstance.java:62)
	at io.quarkiverse.flow.Flow.startInstance(Flow.java:30)
	at org.acme.http.PetstoreFlow_ClientProxy.startInstance(Unknown Source)
	at org.acme.http.PetstoreFlowIT.petstoreWorkflowShouldReturnPetDetails(PetstoreFlowIT.java:29)
	... 5 more

    if (openAPI == null || openAPI.getPaths() == null) {
      throw new IllegalArgumentException("Invalid OpenAPI document");
    }