Silence oauth2client warning when running acloud.

Bug: None
Test: running acloud doesn't show warning anymore.
Change-Id: I4efce9b8cdd0dbd3e3a35fda148d53aec4fc9b1b
diff --git a/public/acloud_main.py b/public/acloud_main.py
index 823bafb..49894fe 100644
--- a/public/acloud_main.py
+++ b/public/acloud_main.py
@@ -66,8 +66,10 @@
 import logging
 import sys
 
-# TODO: Find a better way to handling this import logic.
+# Needed to silence oauth2client.
+logging.basicConfig(level=logging.CRITICAL)
 
+# pylint: disable=wrong-import-position
 from acloud.internal import constants
 from acloud.public import acloud_common
 from acloud.public import config