Upgrade Apache HttpComponents5 to 5.1.3

Release 5.1.3
-----------

This release upgrades HttpCore to the latest 5.1 version and fixes a number of issues found
since release 5.1.2.

Change Log
-------------------

* Fixed incompatibility with older versions of Android shipping with Commons Codec < 1.4.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* Bug fix: ByteArrayBuilder incorrectly handles empty strings.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* HTTPCLIENT-2195, regression: classic ConnectExec incorrectly discards the proxy response body
  even if the request cannot be executed and the response is final.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* HTTPCLIENT-2194: async retries not including body (#343).
  Contributed by Jason Mathison <JasonMathison at users.noreply.github.com>

* Automatically retry requests that failed with RequestNotExecutedException.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* Bug fix: Incorrect connection validity check in the async connection manager can cause
  an IllegalStateException and lead to a connection leak. Treat closed connections as valid
  due to the connection open check being inherently racy.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* Bump log4j to 2.12.3
  Contributed by mxd4 <maxime_droy at ultimatesoftware.com>


Release 5.1.2
-----------

This is an emergency release that fixes a regression introduced in the previous release
that can lead to a connection leak when executing requests with a non-repeatable streaming
entity with the classic (blocking) HttpClient. Async and minimal HttpClient implementations
are not affected by the regression.

Change Log
-------------------

* HTTPCLIENT-2184: Fixed regression in the connection reuse logic of the classic (blocking)
  request execution pipeline.


Release 5.1.1
-----------

This release upgrades HttpCore to the latest 5.1 version and fixes a number of issues found
since release 5.1.


Change Log
-------------------

* Don't initialize AtomicReference to its default value.
  Contributed by Gary Gregory <ggregory at apache.org>

* Corrected resolution of the target host in DefaultUserTokenHandler.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* HTTPCLIENT-2177: automatically force HTTP/1.1 protocol policy when executing requests
  via a proxy tunnel.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* HTTPCLIENT-2177: fixed incorrect route state tracking by the async connect executor
  when negotiating a tunnel via a proxy.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* HTTPCLIENT-2177: keep successful tunnel connections alive regardless of `Connection: close`.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* HTTPCLIENT-2173: async pooling connection manager to close half-open connection gracefully.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* Don't retry a request for NoRouteToHostException.
  Contributed by Jaikiran Pai <jaikiran.pai at gmail.com>

* HTTPCLIENT-2170: Classic protocol layer no longer releases the underlying connection back
  to the pool prematurely while the NTLM handshake is still ongoing.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* Fixed connection lease request cancellation race in both classic and asyc pooling connection
  managers.
  Contributed by Oleg Kalnichevski <olegk at apache.org>