Set run model default timestamp to 0 (#1140)
Set run model default timestamp to 0 (#1140)

Without setting to 0, the finished at field could be null if the argo workflow is already evicted from the cluster. 
This result in errors parsing the table. 

Alternatively we can use sql.NullInt64 type to parse the sql but that's less elegant.
kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines