Bug: NameError: global name 'FileNotFoundError' is not defined (#717)
Bug: NameError: global name 'FileNotFoundError' is not defined (#717)

* handle python2 errors

* updated format

* Update py/kubeflow/testing/run_e2e_workflow.py

* updated to use six
kubeflow/testing,kubeflow/testing,kubeflow/testing,kubeflow/testing,kubeflow/testing