fix: Added missing job tag key in hive_sample_dag.py (#308)

* Added missing job tag key in hive_sample_dag.py

Running "create_table_metadata_databuilder_job()" was giving an Exception : 
""ConfigMissingException" : No Configuration setting found for key job_publish_tag."
Hence,
Adding a missing key for job_publish_tag in "create_table_metadata_databuilder_job()" of hive_sample_dag.py.

* Made changes as per guidelines

Made changes to the code as per guidelines

* Updated the file for failing build

Updated the file for failing build

example/dags/hive_sample_dag.py

@@ -163,6 +163,8 @@ def create_table_metadata_databuilder_job():
             neo4j_password,
         'publisher.neo4j.{}'.format(neo4j_csv_publisher.NEO4J_CREATE_ONLY_NODES):
             [DESCRIPTION_NODE_LABEL],
+        'publisher.neo4j.job_publish_tag':
+            'some_unique_tag'  # TO-DO unique tag must be added
     })
 
     job = DefaultJob(conf=job_config,