[Impala-ASF-CR] IMPALA-4057, IMPALA-4050: Fix --webserver interface

["Thomas Tauber-Marshall (Code Review)" <ge...@cloudera.org>]

Hello Tim Armstrong, Impala Public Jenkins, 

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

    http://gerrit.cloudera.org:8080/14266

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

Change subject: IMPALA-4057, IMPALA-4050: Fix --webserver_interface
......................................................................

IMPALA-4057, IMPALA-4050: Fix --webserver_interface

This patch fixes two issues with --webserver_interface:
- When --webserver_interface was used start-impala-cluster.py with a
  value that's different from --hostname, minicluster startup would
  appear to fail as liveness is determined by checking for the webui's
  availability at the address specified for --hostname.
- The value of --webserver_interface was applied correctly for the
  catalogd and statestored but not for impalads, due to the way
  ExecEnv constructed the Webserver.
- It is now possible to specify a hostname for webserver_interface
  instead of an IP. The webserver will resolve the hostname.

This patch also upgrades our version of psutil to the latest for the
function 'net_if_addrs'. This requires a few change to our use of
psutil, mostly adding '()' to call functions that previously were
variables.

Testing:
- Added a custom cluster test that finds all available interfaces,
  binds the webserver to one of them, and checks that its only
  available over that interface.

Change-Id: Ic7e75908426756d73f13a0fa3cfc21fc31da164c
---
M be/src/runtime/exec-env.cc
M be/src/util/webserver-test.cc
M be/src/util/webserver.cc
M be/src/util/webserver.h
M infra/python/deps/compiled-requirements.txt
M tests/common/impala_cluster.py
M tests/common/impala_service.py
M tests/common/impala_test_suite.py
M tests/custom_cluster/test_client_ssl.py
M tests/custom_cluster/test_web_pages.py
10 files changed, 112 insertions(+), 64 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/66/14266/2
-- 
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ic7e75908426756d73f13a0fa3cfc21fc31da164c
Gerrit-Change-Number: 14266
Gerrit-PatchSet: 2
Gerrit-Owner: Thomas Tauber-Marshall <tm...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <ta...@cloudera.com>