Revert "GH-1148 Configure our own ObjectMapper"

This reverts commit 8b66fd2

Author: Lars Bilger

spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/config/ContextFunctionCatalogAutoConfiguration.java

@@ -214,8 +214,14 @@ private JsonMapper gson(ApplicationContext context) {
 		}
 
 		private JsonMapper jackson(ApplicationContext context) {
-			ObjectMapper mapper = new ObjectMapper();
-			mapper.registerModule(new JavaTimeModule());
+			ObjectMapper mapper;
+			try {
+				mapper = context.getBean(ObjectMapper.class);
+			}
+			catch (Exception e) {
+				mapper = new ObjectMapper();
+			}
+            mapper.registerModule(new JavaTimeModule());
 			mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
 			mapper.configure(DeserializationFeature.FAIL_ON_TRAILING_TOKENS, true);
 			mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);