OZG-7038 add default for schedulerCron

archive-manager-server/src/main/java/de/ozgcloud/archive/common/xta/XtaProperties.java

@@ -53,7 +53,7 @@ public class XtaProperties {
 	/*
 	 * Times in cron format at which Quittungen are fetched.
 	 */
-	private String schedulerCron;
+	private String schedulerCron = "0 0/15 * * * *";
 
 	@Getter
 	@Setter