chromite: More forgiving and more verbose gce.py

Recent GCETestStage failures show that image creation could very well take as
long as 6 minutes, so bumping the timeout threshold to 10 minutes just to be
safe. Also increasing the timeout for instance creation for the same reason.

Additionally, adding more logs to help debugging.

BUG=None
TEST=trybot against lakitu-pre-cq

Change-Id: I855aab455daa73c4fe4aab49d0719ba8c7ffe762
Reviewed-on: https://chromium-review.googlesource.com/319191
Commit-Ready: Daniel Wang <wonderfly@google.com>
Tested-by: Daniel Wang <wonderfly@google.com>
Reviewed-by: Daniel Wang <wonderfly@google.com>
Reviewed-by: Andrey Ulanov <andreyu@google.com>
1 file changed