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Since r786851, the docserver integration test is hanging causing
presubmits to fail. Also, the cron script which we use to update the
docserver is hanging. This is because r786851 added dependencies on
behavior features. However behavior features are not accounted for in
features_bundles.py which is used to resolve feature characteristics
like channel, platform etc. Since the code in the file expects that all
features will eventually be resolved, it keeps running indefinitely.

To fix:

- Ensure behavior features are ignored for the purpose of evalauting
feature characteristics for the docserver.

- Break out of the loop in GetFeatures if no new features are resolved
after a top level iteration. This'll ensure that the script terminates
eventually. Also, log an error if any features are left unresolved.

Other fixes:

- Delete cloudPrintPrivate.html. It was causing presubmit to fail since
beginning r785624, cloudPrintPrivate is disabled for extensions.

- Disable pylint checking in
chrome/common/extensions/docs/server2/PRESUBMIT.py. There are multiple
failures there already and it is causing the presubmit step to timeout.

BUG=1103846, 1105211
TEST=python
chrome/common/extensions/docs/server2/integration_test.py --
apps/developerPrivate doesn't hang

Change-Id: I640ea35a66ecd863e39ca7b9b2e3e5469bfae2a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2296866Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788844}