[AIRFLOW-4895] Import Iterable from collections.abc to fix DeprecationWarning in Python 3.7#5533

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ashb merged 1 commit intoapache:masterfrom

tirkarthi:fix-collections-warning

Jul 4, 2019

Commits on Jul 4, 2019

[AIRFLOW-4895] Import Iterable from collections.abc to fix DeprecationWarning in Python 3.7
tirkarthi
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