BigQuery System Tests Failing in Python3

[dhermes]

Seen on Travis and duplicated locally for me:

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ERROR: test_load_table_from_storage_then_dump_table (bigquery.TestBigQuery)
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Traceback (most recent call last):
 File "/path/to/gcloud-python/system_tests/bigquery.py", line 270, in test_load_table_from_storage_then_dump_table
 writer.writerow(('Full Name', 'Age'))
TypeError: 'str' does not support the buffer interface

======================================================================
ERROR: test_load_table_from_storage_then_dump_table (bigquery.TestBigQuery)
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Traceback (most recent call last):
 File "/path/to/gcloud-python/system_tests/bigquery.py", line 36, in tearDown
 doomed.delete()
 File "/path/to/gcloud-python/.tox/system-tests3/lib/python3.4/site-packages/gcloud/storage/blob.py", line 243, in delete
 return self.bucket.delete_blob(self.name, client=client)
 File "/path/to/gcloud-python/.tox/system-tests3/lib/python3.4/site-packages/gcloud/storage/bucket.py", line 399, in delete_blob
 _target_object=None)
 File "/path/to/gcloud-python/.tox/system-tests3/lib/python3.4/site-packages/gcloud/connection.py", line 419, in api_request
 error_info=method + ' ' + url)
gcloud.exceptions.NotFound: 404 Not Found (DELETE https://www.googleapis.com/storage/v1/b/bq_load_test_1439925277970/o/person_ages.csv)

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Ran 11 tests in 46.300s

FAILED (errors=2)

[dhermes]

Also worth noting that this leaves a bucket undeleted / cleaned up after:

[tseaver]

I will tackle this one ASAP.