OZG-7689 add json autostarter

pom.xml

@@ -86,8 +86,8 @@
 			<artifactId>spring-webflux</artifactId>
 		</dependency>
 		<dependency>
-			<groupId>com.fasterxml.jackson.datatype</groupId>
-			<artifactId>jackson-datatype-jsr310</artifactId>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-json</artifactId>
 		</dependency>
 		
 		<!-- commons -->

src/main/java/de/ozgcloud/processor/vorgang/Vorgang.java

@@ -24,7 +24,6 @@
 package de.ozgcloud.processor.vorgang;
 
 import java.time.ZonedDateTime;
-import java.util.Objects;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonProperty.Access;
@@ -63,11 +62,6 @@ public class Vorgang {
 		private String event;
 		private String status;
 		private ZonedDateTime createdAt;
-
-		@JsonProperty
-		public String getCreatedAt() {
-			return Objects.isNull(createdAt) ? null : createdAt.toString();
-		}
 	}
 
 	public Vorgang withEvent(String event) {