[AIRFLOW-5814] Implementing Presto hook tests

[blcksrx]

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Tests

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[codecov-io]

Codecov Report

Merging #6491 into master will decrease coverage by 0.25%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6491      +/-   ##
==========================================
- Coverage   83.96%   83.71%   -0.26%     
==========================================
  Files         635      635              
  Lines       36674    36674              
==========================================
- Hits        30792    30700      -92     
- Misses       5882     5974      +92

Impacted Files	Coverage Δ
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
airflow/kubernetes/pod_launcher.py	45.25% <0%> (-46.72%)	⬇️
airflow/kubernetes/kube_client.py	33.33% <0%> (-41.67%)	⬇️
...rflow/contrib/operators/kubernetes_pod_operator.py	70.14% <0%> (-28.36%)	⬇️
airflow/utils/dag_processing.py	58.15% <0%> (-0.33%)	⬇️
airflow/hooks/dbapi_hook.py	91.52% <0%> (+0.84%)	⬆️
airflow/hooks/presto_hook.py	77.55% <0%> (+40.81%)	⬆️

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[feng-tao]

thanks.