AN4 Dataset not resolving can't download data for nemo asr tutorial 
**Describe the bug**
AN4 Dataset not resolving can't download data for nemo asr tutorial 

**Steps/Code to reproduce bug**

```python 
import glob
import os
import subprocess
import tarfile
import wget

# Download the dataset. This will take a few moments...
print("******")
if not os.path.exists(data_dir + '/an4_sphere.tar.gz'):
    an4_url = 'http://www.speech.cs.cmu.edu/databases/an4/an4_sphere.tar.gz'
    an4_path = wget.download(an4_url, data_dir)
    print(f"Dataset downloaded at: {an4_path}")
else:
    print("Tarfile already exists.")
    an4_path = data_dir + '/an4_sphere.tar.gz'

if not os.path.exists(data_dir + '/an4/'):
    # Untar and convert .sph to .wav (using sox)
    tar = tarfile.open(an4_path)
    tar.extractall(path=data_dir)

    print("Converting .sph to .wav...")
    sph_list = glob.glob(data_dir + '/an4/**/*.sph', recursive=True)
    for sph_path in sph_list:
        wav_path = sph_path[:-4] + '.wav'
        cmd = ["sox", sph_path, wav_path]
        subprocess.run(cmd)
print("Finished conversion.\n******")
```

```
ConnectionResetError                      Traceback (most recent call last)
/tmp/ipykernel_1062/2607186822.py in <module>
      9 if not os.path.exists(data_dir + '/an4_sphere.tar.gz'):
     10     an4_url = 'http://www.speech.cs.cmu.edu/databases/an4/an4_sphere.tar.gz'
---> 11     an4_path = wget.download(an4_url, data_dir)
     12     print(f"Dataset downloaded at: {an4_path}")
     13 else:

~/conda/lib/python3.8/site-packages/wget.py in download(url, out, bar)
    524     else:
    525         binurl = url
--> 526     (tmpfile, headers) = ulib.urlretrieve(binurl, tmpfile, callback)
    527     filename = detect_filename(url, out, headers)
    528     if outdir:

~/conda/lib/python3.8/urllib/request.py in urlretrieve(url, filename, reporthook, data)
    245     url_type, path = _splittype(url)
    246 
--> 247     with contextlib.closing(urlopen(url, data)) as fp:
    248         headers = fp.info()
    249 

~/conda/lib/python3.8/urllib/request.py in urlopen(url, data, timeout, cafile, capath, cadefault, context)
    220     else:
    221         opener = _opener
--> 222     return opener.open(url, data, timeout)
    223 
    224 def install_opener(opener):

~/conda/lib/python3.8/urllib/request.py in open(self, fullurl, data, timeout)
    523 
    524         sys.audit('urllib.Request', req.full_url, req.data, req.headers, req.get_method())
--> 525         response = self._open(req, data)
    526 
    527         # post-process response

~/conda/lib/python3.8/urllib/request.py in _open(self, req, data)
    540 
    541         protocol = req.type
--> 542         result = self._call_chain(self.handle_open, protocol, protocol +
    543                                   '_open', req)
    544         if result:

~/conda/lib/python3.8/urllib/request.py in _call_chain(self, chain, kind, meth_name, *args)
    500         for handler in handlers:
    501             func = getattr(handler, meth_name)
--> 502             result = func(*args)
    503             if result is not None:
    504                 return result

~/conda/lib/python3.8/urllib/request.py in http_open(self, req)
   1381 
   1382     def http_open(self, req):
-> 1383         return self.do_open(http.client.HTTPConnection, req)
   1384 
   1385     http_request = AbstractHTTPHandler.do_request_

~/conda/lib/python3.8/urllib/request.py in do_open(self, http_class, req, **http_conn_args)
   1356             except OSError as err: # timeout error
   1357                 raise URLError(err)
-> 1358             r = h.getresponse()
   1359         except:
   1360             h.close()

~/conda/lib/python3.8/http/client.py in getresponse(self)
   1345         try:
   1346             try:
-> 1347                 response.begin()
   1348             except ConnectionError:
   1349                 self.close()

~/conda/lib/python3.8/http/client.py in begin(self)
    305         # read until we get a non-100 response
    306         while True:
--> 307             version, status, reason = self._read_status()
    308             if status != CONTINUE:
    309                 break

~/conda/lib/python3.8/http/client.py in _read_status(self)
    266 
    267     def _read_status(self):
--> 268         line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
    269         if len(line) > _MAXLINE:
    270             raise LineTooLong("status line")

~/conda/lib/python3.8/socket.py in readinto(self, b)
    667         while True:
    668             try:
--> 669                 return self._sock.recv_into(b)
    670             except timeout:
    671                 self._timeout_occurred = True

ConnectionResetError: [Errno 104] Connection reset by peer
```

**Expected behavior**

An4 dataset should download

**Environment overview (please complete the following information)**

 - Environment location: [Bare-metal, Docker, Cloud(specify cloud provider - AWS, Azure, GCP, Collab)]
 - Method of NeMo install: [pip install or from source]. Please specify exact commands you used to install.
 - If method of install is [Docker], provide `docker pull` & `docker run` commands used

**Environment details**

If NVIDIA docker image is used you don't need to specify these.
Otherwise, please provide:
- OS version
- PyTorch version
- Python version

**Additional context**

Add any other context about the problem here.
Example: GPU model
