cachetools, google-auth, namespace-google: upgraded packages to upstream

Upgraded dev-python/cachetools to version 2.0.1 on amd64
Upgraded dev-python/google-auth to version 1.0.1 on amd64
Upgraded dev-python/namespace-google to version 1 on amd64

BUG=chromium:825013
TEST=moblab tryjob

Change-Id: I5968474b1fcccd247cea030200dc82a276fcad93
Reviewed-on: https://chromium-review.googlesource.com/1002977
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
11 files changed