QuboleHook unable to build command with list tags

Apache Airflow version: 1.10.10

Kubernetes version (if you are using kubernetes) (use kubectl version):

Environment:

• Cloud provider or hardware configuration: Google Cloud
• OS (e.g. from /etc/os-release): Ubuntu 18.04.4 LTS
• Kernel (e.g. uname -a): Linux int-vidio-stats-airflow-bionic 5.0.0-1034-gcp #35-Ubuntu SMP Tue Mar 17 03:56:45 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
• Install tools: pip
• Others:

What happened:

Recently, we upgraded airflow version from v1.10.5 to v1.10.10 due to airflow instance that upgraded to ubuntu bionic. Existing dag configuration having tags as list causes an issue at some jobs that use Qubole. Error log:

Traceback (most recent call last):
  File "/home/jenkins/virtualenv/airflow/lib/python3.6/site-packages/airflow/models/taskinstance.py", line 983, in _run_raw_task
    result = task_copy.execute(context=context)
  File "/home/jenkins/virtualenv/airflow/lib/python3.6/site-packages/airflow/contrib/operators/qubole_operator.py", line 207, in execute
    return self.get_hook().execute(context)
  File "/home/jenkins/virtualenv/airflow/lib/python3.6/site-packages/airflow/contrib/hooks/qubole_hook.py", line 131, in execute
    args = self.cls.parse(self.create_cmd_args(context))
  File "/home/jenkins/virtualenv/airflow/lib/python3.6/site-packages/airflow/contrib/hooks/qubole_hook.py", line 248, in create_cmd_args
    self._add_tags(tags, value)
  File "/home/jenkins/virtualenv/airflow/lib/python3.6/site-packages/airflow/contrib/hooks/qubole_hook.py", line 267, in _add_tags
    tags.extend(value)
AttributeError: 'set' object has no attribute 'extend'

What you expected to happen:

the tags should be included as a comma separated arguments to the build command.

How to reproduce it: using sample dag having list tags

    t2 = QuboleOperator(
        task_id='hive_gcs_location',
        command_type="hivecmd",
        script_location="s3n://public-qubole/qbol-library/scripts/show_table.hql",
        notify=True,
        tags=['tag1', 'tag2'],
        trigger_rule="all_done"
    )

and do an airflow run.

[mik-laj]

@chattarajoy I assigned you to these tickets.

[chattarajoy]

sure @mik-laj, created issues for both the points mentioned will look into it. Could you pls change the assignee for the to me?