Override default token resolution order in docker-credential-gcr for integration testing (#3797)
Override default token resolution order in docker-credential-gcr for integration testing (#3797)

* Part of troubleshooting potential causes for intermittent authentication errors that we started observing in MacOS continuous CI
* Adds an additional line into continuous build script to have GOOGLE_APPLICATION_CREDENTIALS searched first by docker-credential-gcr and overrides the default search order
GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib,GoogleContainerTools/jib