[AIRFLOW-6133] Make Hive transfer operators pylint compatible

[turbaszek]

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Jira

• My PR addresses the following Airflow Jira issues and references them in the PR title. For example, "[AIRFLOW-XXX] My Airflow PR"
  • https://issues.apache.org/jira/browse/AIRFLOW-6133

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Tests

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Documentation

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[potiuk]

Few nits.

[potiuk]

❤️

[codecov-io]

Codecov Report

Merging #6695 into master will decrease coverage by 0.3%.
The diff coverage is 70.73%.

@@            Coverage Diff             @@
##           master    #6695      +/-   ##
==========================================
- Coverage   83.83%   83.52%   -0.31%     
==========================================
  Files         668      668              
  Lines       37547    37565      +18     
==========================================
- Hits        31477    31377     -100     
- Misses       6070     6188     +118

Impacted Files	Coverage Δ
airflow/contrib/operators/vertica_to_hive.py	0% <0%> (ø)	⬆️
airflow/operators/mysql_to_hive.py	100% <100%> (ø)	⬆️
airflow/operators/hive_to_mysql.py	100% <100%> (ø)	⬆️
airflow/contrib/operators/hive_to_dynamodb.py	100% <100%> (ø)	⬆️
airflow/operators/mssql_to_hive.py	100% <100%> (ø)	⬆️
airflow/operators/hive_to_samba_operator.py	100% <100%> (ø)	⬆️
airflow/operators/hive_to_druid.py	65.15% <28.57%> (+0.53%)	⬆️
airflow/operators/s3_to_hive_operator.py	94.01% <71.42%> (+0.05%)	⬆️
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
... and 11 more

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