1835 Handle the null case properly in setMetadata methods

Author: ivicac

server/libs/atlas/atlas-execution/atlas-execution-api/src/main/java/com/bytechef/atlas/execution/domain/Job.java

@@ -315,7 +315,11 @@ public void setLabel(String label) {
     }
 
     public void setMetadata(Map<String, ?> metadata) {
-        this.metadata = new MapWrapper(metadata);
+        if (metadata == null) {
+            this.metadata = new MapWrapper();
+        } else {
+            this.metadata = new MapWrapper(metadata);
+        }
     }
 
     public void setOutputs(FileEntry outputs) {

server/libs/atlas/atlas-execution/atlas-execution-api/src/main/java/com/bytechef/atlas/execution/domain/TaskExecution.java

@@ -458,7 +458,9 @@ public void setMaxRetries(int maxRetries) {
     }
 
     public void setMetadata(Map<String, ?> metadata) {
-        if (metadata != null) {
+        if (metadata == null) {
+            this.metadata = new MapWrapper();
+        } else {
             this.metadata = new MapWrapper(metadata);
         }
     }