Import errors on scripts/provision_credentials.py

[amarjandu]

Import errors when trying to destroy google_service_account using Terraform
see error in:
https://gitlab.dev.singlecell.gi.ucsc.edu/snippets/7

Note that the service account that was being used was still destroyed as requested.

[amarjandu]

@hannes-ucsc 'ideally errors would not be present, if not, explain that they are benign either in the process output, or within the README.md'

[amarjandu]

Note that in the attached log there terraform command that was run was
terraform destroy -target=google_service_account.service_account
while from the develop branch the command is
terraform destroy -target=google_service_account.indexer
The error is the same regardless of the changes to the resource name.

[melainalegaspi]

@hannes-ucsc :"Don't know why this was spiked. To be triaged."

[amarjandu]

@hannes-ucsc this was spiked to confirm that the errors were in fact benign.

[jessebrennan]

The printed stack traces are benign. The warning that precedes them explains the issue. It's possible to filter them out googleapis/google-api-python-client#299 (comment) which is what I'll do.