Remove dependency on http://www.csie.ntu.edu.tw for LibSVMIter test

[anirudh2290]

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Description

The dependency here on www.csie.ntu.edu.tw should be changed to be hosted on our own S3 bucket. See https://github.com/apache/incubator-mxnet/blob/master/tests/python/unittest/test_io.py#L218

[eric-haibin-lin]

We need to review the license of that dataset before hosting it ourselves.

[KellenSunderland]

Just had a test failure due to this external dep: http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/incubator-mxnet/detail/PR-9055-merge/11/pipeline/337

======================================================================

ERROR: test_io.test_LibSVMIter

----------------------------------------------------------------------

Traceback (most recent call last):

  File "C:\Anaconda3\envs\py3\lib\site-packages\nose\case.py", line 197, in runTest

    self.test(*self.arg)

  File "C:\jenkins_slave\workspace\ut-python-cpu@2\tests\python\unittest\test_io.py", line 254, in test_LibSVMIter

    check_libSVMIter_news_data()

  File "C:\jenkins_slave\workspace\ut-python-cpu@2\tests\python\unittest\test_io.py", line 238, in check_libSVMIter_news_data

    news_metadata['origin_name'])

  File "C:\jenkins_slave\workspace\ut-python-cpu@2\pkg_vc14_cpu\python\mxnet\test_utils.py", line 1498, in get_bz2_data

    download(url, fname=data_origin_name, dirname=data_dir, overwrite=False)

  File "C:\jenkins_slave\workspace\ut-python-cpu@2\pkg_vc14_cpu\python\mxnet\test_utils.py", line 1411, in download

    r = requests.get(url, stream=True)

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\api.py", line 70, in get

    return request('get', url, params=params, **kwargs)

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\api.py", line 56, in request

    return session.request(method=method, url=url, **kwargs)

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\sessions.py", line 488, in request

    resp = self.send(prep, **send_kwargs)

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\sessions.py", line 630, in send

    history = [resp for resp in gen] if allow_redirects else []

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\sessions.py", line 630, in <listcomp>

    history = [resp for resp in gen] if allow_redirects else []

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\sessions.py", line 190, in resolve_redirects

    **adapter_kwargs

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\sessions.py", line 609, in send

    r = adapter.send(request, **kwargs)

  File "C:\Anaconda3\envs\py3\lib\site-packages\requests\adapters.py", line 497, in send

    raise SSLError(e, request=request)

requests.exceptions.SSLError: EOF occurred in violation of protocol (_ssl.c:749)

-------------------- >> begin captured logging << --------------------

requests.packages.urllib3.connectionpool: DEBUG: Starting new HTTP connection (1): www.csie.ntu.edu.tw

requests.packages.urllib3.connectionpool: DEBUG: http://www.csie.ntu.edu.tw:80 "GET /~cjlin/libsvmtools/datasets/multiclass/news20.t.bz2 HTTP/1.1" 301 287

requests.packages.urllib3.connectionpool: DEBUG: Starting new HTTPS connection (1): www.csie.ntu.edu.tw

--------------------- >> end captured logging << ---------------------

[eric-haibin-lin]

Fixed by #9620