Add small delay in metrics handler to account for delay in Kubernetes publishing Job status
Add small delay in metrics handler to account for delay in Kubernetes publishing Job status

Change-Id: If182899d88796e8ba6b9de66e6b0191788fe69a7
Reviewed-on: https://team-review.git.corp.google.com/c/cloud-accelerators-ml/xl-ml-test/+/660331
Reviewed-by: Will Cromar <9dd12cd09dbd89f2974e2a7cca1005dfdecf87da@google.com>

GoogleCloudPlatform/ml-testing-accelerators,GoogleCloudPlatform/ml-testing-accelerators