Support application default credentials (ADC) for Google Pub/Sub#15668

Merged

andrewkroh merged 9 commits intoelastic:masterfrom mwasilew2:master

Apr 17, 2020

+99-11

Commits on Apr 16, 2020

use ADC on GCP instances

mwasilew2
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andrewkroh
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check all three authentication mechanisms

mwasilew2
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andrewkroh
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CredentialsJSON is a json

mwasilew2
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andrewkroh
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add missing libs

mwasilew2
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andrewkroh
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Add test, update docs, updates googlecloud modules
andrewkroh
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changelog
andrewkroh
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Fix typo in test comment
andrewkroh
committed

Commits on Apr 17, 2020