Azure: Getting "Retryable error" on bbsVmssTemplate while deploying Bitbucket

Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. Deploy Bitbucket using Azure
2. It's a fickle error, so it may or may not appear.

Expected Results

Successful deployment

Actual Results

Deployment failed with "RetryableError"

Workaround

Just redeploy the bbsVmssTemplate manually and this error will disappear