[Impala-ASF-CR] IMPALA-4933, IMPALA-4931: Simplify SSL initialization on startup

["Matthew Jacobs (Code Review)" <ge...@cloudera.org>]

Matthew Jacobs has uploaded a new patch set (#2).

Change subject: IMPALA-4933, IMPALA-4931: Simplify SSL initialization on startup
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IMPALA-4933, IMPALA-4931: Simplify SSL initialization on startup

OpenSSL initialization functions are not threadsafe and are
currently called by both thrift, squeasel, and the Kudu
client. This change forces thrift to initialize OpenSSL on
startup by adding a TSSLSocketFactory to the AuthManager
which initializes OpenSSL upon creation and lives the
lifetime of the process. Then, squeasel is configured to
skip the OpenSSL initialization.

TODO: When the Kudu client supports a flag to disable its
initialization path (KUDU-1738), Impala will call that. In
the meantime, there will continue to be some small
likelihood of a race.

Also updates Squeasel in thirdparty to
c304d3f3481b07bf153979155f02e0aab24d01de
This is necessary to configure squeasel not to init OpenSSL.

Change-Id: I245a8a001103ddca7f07349faa82bbb5b9fe3ab0
---
M be/src/rpc/authentication.cc
M be/src/rpc/authentication.h
M be/src/thirdparty/squeasel/squeasel.c
M be/src/util/CMakeLists.txt
M be/src/util/webserver.cc
5 files changed, 54 insertions(+), 29 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/27/6027/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I245a8a001103ddca7f07349faa82bbb5b9fe3ab0
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Matthew Jacobs <mj...@cloudera.com>
Gerrit-Reviewer: Matthew Jacobs <mj...@cloudera.com>
Gerrit-Reviewer: Sailesh Mukil <sa...@cloudera.com>