Fix broken tests after updateding the models from DALL-E-2 to DALL-E-3

Author: tzolov

models/spring-ai-openai/src/test/java/org/springframework/ai/openai/image/OpenAiImageClientIT.java

@@ -58,7 +58,7 @@ void imageAsUrlTest() {
 		OpenAiImageGenerationMetadata openAiImageGenerationMetadata = (OpenAiImageGenerationMetadata) imageGenerationMetadata;
 
 		assertThat(openAiImageGenerationMetadata).isNotNull();
-		assertThat(openAiImageGenerationMetadata.getRevisedPrompt()).isNull();
+		assertThat(openAiImageGenerationMetadata.getRevisedPrompt()).isNotBlank();
 	}
 
 }

spring-ai-spring-boot-autoconfigure/src/test/java/org/springframework/ai/autoconfigure/openai/OpenAiAutoConfigurationIT.java

@@ -92,7 +92,7 @@ void embedding() {
 
 	@Test
 	void generateImage() {
-		contextRunner.withPropertyValues("spring.ai.openai.image.options.size=256x256").run(context -> {
+		contextRunner.withPropertyValues("spring.ai.openai.image.options.size=1024x1024").run(context -> {
 			OpenAiImageClient client = context.getBean(OpenAiImageClient.class);
 			ImageResponse imageResponse = client.call(new ImagePrompt("forest"));
 			assertThat(imageResponse.getResults()).hasSize(1);