HADOOP-16319. S3A Etag tests fail with default encryption enabled on bucket. Contributed by Ben Roling.
ETag values are unpredictable with some S3 encryption algorithms.
Skip ITestS3AMiscOperations tests which make assertions about etags when default encryption on a bucket is enabled.
When testing with an AWS an account which lacks the privilege for a call to getBucketEncryption(), we don't skip the tests. In the event of failure, developers get to expand the permissions of the account or relax default encryption settings.