Fix few issues in TPU util functions

tensorflow / benchmarks

A benchmark framework for Tensorflow

Apache License 2.0

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Closed davidmochen closed 4 years ago

davidmochen commented 4 years ago

Fix a couple of typos in setup_tpu, cleanup_tpu
Use "./ctpu" instead of "ctpu", because in some VM shells, "./ctpu" is needed to locate downloaded ctpu binary
Add some logging for future debugging

Tested: ran with PerfZero in the same cloud VM we have been using for TPU benchmarks and observed TPU created and later deleted