# Type of request: This is a ...
[ ] bug report
[x] feature request

# Detailed description
As a Developer,
I want to be able to simulate BadDigest and InvalidDigest errors,
So that I can test the error handling logic

## Expected behavior
https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
BadDigest: The Content-MD5 you specified did not match what we received.
InvalidDigest: The Content-MD5 you specified is not valid.

## Actual behavior
localstack returns InvalidDigest when MD5 does not match payload.


dynamodb.tag_resource(
            ResourceArn=table_arn,
            Tags=[
                {
                    'Key': 'NewKey',
                    'Value': 'TestValue'
                }
            ]
        )
        rs = dynamodb.list_tags_of_resource(
            ResourceArn=table_arn
        )
        self.assertEqual(len(rs['Tags']), len(TEST_DDB_TAGS) + 1)
        tags = {tag['Key']: tag['Value'] for tag in rs['Tags']}
        self.assertIn('NewKey', tags.keys())
        self.assertEqual(tags['NewKey'], 'TestValue')
        dynamodb.untag_resource(
            ResourceArn=table_arn,
            TagKeys=[
                'Name', 'NewKey'
            ]
        )
        rs = dynamodb.list_tags_of_resource(
            ResourceArn=table_arn
        )
        tags = {tag['Key']: tag['Value'] for tag in rs['Tags']}
        self.assertNotIn('Name', tags.keys())
        self.assertNotIn('NewKey', tags.keys())
        delete_table(table_name)
    def test_stream_spec_and_region_replacement(self):