Add checking on the attributes list

provider/indexer-azure/src/main/java/org/opengroup/osdu/indexer/azure/util/IndexerQueueTaskBuilderAzure.java

@@ -171,7 +171,7 @@ public class IndexerQueueTaskBuilderAzure extends IndexerQueueTaskBuilder {
         jo.addProperty(DpsHeaders.DATA_PARTITION_ID, headers.getPartitionIdWithFallbackToAccountId());
         jo.addProperty(DpsHeaders.CORRELATION_ID, headers.getCorrelationId());
         // Append the ancestry kinds used to prevent circular chasing
-        if(attributes.containsKey(Constants.ANCESTRY_KINDS)) {
+        if(attributes != null && attributes.containsKey(Constants.ANCESTRY_KINDS)) {
             jo.addProperty(Constants.ANCESTRY_KINDS, attributes.get(Constants.ANCESTRY_KINDS));
         }
         JsonObject jomsg = new JsonObject();