Use GET in scroll to enable method-based access control

Author: Armagnac

elasticsearch/client/__init__.py

@@ -552,7 +552,7 @@ def scroll(self, scroll_id, params=None):
  :arg scroll: Specify how long a consistent view of the index should be
  maintained for scrolled search
  """
- _, data = self.transport.perform_request('POST', _make_path('_search', 'scroll'),
+ _, data = self.transport.perform_request('GET', '/_search/scroll',
  params=params, body=scroll_id)
  return data