swift3 does not enforce missing write permission for owner on bucket

[Christof Schmitt]

From the failing s3tests testcase:

======================================================================
FAIL: s3tests.functional.test_s3.test_bucket_acl_no_grants
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/s3-tests/virtualenv/lib/python2.6/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/s3-tests/s3tests/functional/test_s3.py", line 3787, in test_bucket_acl_no_grants
    check_access_denied(key.set_contents_from_string, 'bar')
  File "/s3-tests/s3tests/functional/test_s3.py", line 64, in check_access_denied
    e = assert_raises(boto.exception.S3ResponseError, fn, *args, **kwargs)
  File "/s3-tests/s3tests/functional/utils.py", line 21, in assert_raises
    raise AssertionError("%s not raised" % excName)
AssertionError: S3ResponseError not raised

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/227035