Add no_proxy_hosts configuration to proxy options/config. #532
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Description of changes:
no_proxy_hoststo proxy options/config - allowing configuration of no_proxy through code rather than just ENV. Theno_proxy_hostsbehaves the same was as the NO_PROXY env setting added in support no_proxy exactly like CURL #522close_connection_on_server_errortest to mock server instead for reliable testing.By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.