client: fix exception semantics in _raise_for_status (#2954)

We want "The above exception was the direct cause of the following exception:" instead of "During handling of the above exception, another exception occurred:" Signed-off-by: Maor Kleinberger <kmaork@gmail.com>

Author: kmaork

docker/api/client.py

@@ -267,7 +267,7 @@ def _raise_for_status(self, response):
  try:
  response.raise_for_status()
  except requests.exceptions.HTTPError as e:
- raise create_api_error_from_http_exception(e)
+ raise create_api_error_from_http_exception(e) from e
 
  def _result(self, response, json=False, binary=False):
  assert not (json and binary)