[kudu-CR] Make the meta cache return Status::NetworkError if no addresses were found

["David Ribeiro Alves (Code Review)" <ge...@cloudera.org>]

David Ribeiro Alves has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/3027

Change subject: Make the meta cache return Status::NetworkError if no addresses were found
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Make the meta cache return Status::NetworkError if no addresses were found

This adds a new flag 'fail_dns_resolution' to net-util.cc so that we can fail
dns resolution on purpose and makes it so that the meta cache returns Status:NetworkError
in this case, instead of NotFound as before.

This also adds a test that makes sure that we get Status::NetworkError() back
if we set the flag and that normal resolution resumes once it's set to the default
value.

Changing this error type allows to have a clearer error handling path as there is
one less status type to handle.

Change-Id: I95b553f1db1b76f9e8117b6628c7bf64013d1ad9
---
M src/kudu/client/client-test.cc
M src/kudu/client/meta_cache.cc
M src/kudu/util/net/net_util.cc
3 files changed, 38 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/27/3027/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I95b553f1db1b76f9e8117b6628c7bf64013d1ad9
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: David Ribeiro Alves <da...@cloudera.com>