[kudu-CR] [util] introduced custom gflags validators

["Alexey Serbin (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins,

I'd like you to reexamine a change.  Please visit

    http://gerrit.cloudera.org:8080/6795

to look at the new patch set (#2).

Change subject: [util] introduced custom gflags validators
......................................................................

[util] introduced custom gflags validators

Use CUSTOM_FLAG_VALIDATOR() macro to register late-phase validator
function for flags. The validation is performed upon call of
HandleCommonFlags() invoked by the top-level ParseCommandLineFlags()
function.

Added unit test to cover the new functionality.

Updated validators for security-related RPC and embedded webserver
flags.

This patch addresses the following JIRA item:

  KUDU-1993: The validation of 'grouped' flags works incorrectly
    if flags re-ordered

Change-Id: I3755d62590cdc63a9d501ba69d980cb15f8069a9
---
M src/kudu/rpc/messenger.cc
M src/kudu/server/webserver_options.cc
M src/kudu/util/CMakeLists.txt
A src/kudu/util/flag_validators-test.cc
A src/kudu/util/flag_validators.cc
A src/kudu/util/flag_validators.h
M src/kudu/util/flags.cc
7 files changed, 349 insertions(+), 29 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/95/6795/2
-- 
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I3755d62590cdc63a9d501ba69d980cb15f8069a9
Gerrit-PatchSet: 2
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Alexey Serbin <as...@cloudera.com>
Gerrit-Reviewer: Adar Dembo <ad...@cloudera.com>
Gerrit-Reviewer: Dan Burkert <da...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>