ResourceManager.cluster_submit_application fails with JSON error

[kevin-bates]

When using ResourceManager.cluster_submit_application() to submit a YARN application, the response is not properly handled and results in the following traceback...

  File "/opt/anaconda2/envs/py3/lib/python3.6/site-packages/yarn_api_client/resource_manager.py", line 397, in cluster_submit_application
    return self.request(path, 'POST', data=data)
  File "/opt/anaconda2/envs/py3/lib/python3.6/site-packages/yarn_api_client/base.py", line 84, in request
    return self.response_class(response)
  File "/opt/anaconda2/envs/py3/lib/python3.6/site-packages/yarn_api_client/base.py", line 23, in __init__
    self.data = response.json()
  File "/opt/anaconda2/envs/py3/lib/python3.6/site-packages/requests/models.py", line 897, in json
    return complexjson.loads(self.text, **kwargs)
  File "/opt/anaconda2/envs/py3/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/opt/anaconda2/envs/py3/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/opt/anaconda2/envs/py3/lib/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

The issue appears to be related to responses that contain no content. In my opinion, this is a bug with response.json(), but we should probably handle this.

The request status code is the expected 202, but there is no "location" entry as described in the REST API. I see an empty response using other REST clients as well.

This was discovered while troubleshooting #75 and the python file included in that issue can be used to reproduce this.

This could very well be an issue with the Hadoop cluster I'm running against also. (HDP 2.7.3.2.6.5.0-292)