Retry integration tests on any exception. (#2019)

The previous version of this logic retried a test if any of its
`self.assert...` calls failed.

However, that does not handle the case where a nested call to
`datalab` fails. In those cases a `CalledProcessError` would be
raised.

To retry on those scenarios as well, we extend the retry logic
to retry on any instance of the `Exception` class.

Change the cloud build to use CUDA 9-0 instead of 9-1 (#2008)

Pick a random zone for CLI tests. (#2004)

This changes the CLI end-to-end test so that it defaults to
picking a random zone in the region 'us-west' instead of being
hard-coded to 'us-west1-a'.

The test will still honor the 'zone' config setting in gcloud if
it is set; this only changes the behavior when that is not set.

Don't delete the h5py tests directory. (#1971)

h5py references this directory during import.

Updates numpy to 1.14 and also updates scikit-learn (->0.19.1) and st…

…atsmodel (->0.8.0) to satisfy new dependencies (#1965)

Updates numpy to 1.14 and also updates scikit-learn (->0.19.1) and st…

…atsmodel (->0.8.0) to satisfy new dependencies (#1965)

Switching to Tensorflow 1.5 (#1941)

* Switching to Tensorflow 1.5

Updating to CUDA 9 and cuDNN v7 for GPU images as that version is
required by TF 1.5, this has the additional benefit of adding support
for V100 (Volta) GPUs.

Auto-refresh the access token. (#1897)

Add caching to github-file-manager. (#1762)

List files using DriveFileManager (#1587)

A significant part of this PR is also a refactor for the UnsupportedMethod error, and moving BigQuery-specific and Drive-specific methods in the GapiManager into their own nested classes.

* added drive file manager

* drive listing working

* refactor GapiManager to split drive and bigquery apis

* use object instead of constructor on UnsupportedMethod call

* cleanup

* rebase artifacts

* sort files on folder,modified,name

* pr comments

* add reverted grantScope call