Set DISABLE_CLOUD_STORAGE_IO back after psuedo lock tests
Set DISABLE_CLOUD_STORAGE_IO back after psuedo lock tests

This is a follow-up to https://codereview.chromium.org/2645113002/,
where I introduced the problem.

TBR=nednguyen@google.com
BUG=chromium:682005

Review-Url: https://codereview.chromium.org/2647323011

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