Set default taking access for GradingProjectSurvey to org.
This will allow Mentors and Org Admins to take GradingProjectSurveys in case that an Org Admin has no Mentor roles.
#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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