[kudu-CR] Add a generic retriable rpc class

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

Hello Kudu Jenkins,

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

    http://gerrit.cloudera.org:8080/3064

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

Change subject: Add a generic retriable rpc class
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Add a generic retriable rpc class

This patch adds a new, generic, class for retriable Rpcs: RetriableRpc.
This class will handle retry logic, such as setting id/sequence numbers on
the rpc header, as well as number of attempts.

Children of this class no longer have to deal with logic regarding replica
selection, proxy initialization or retrying. They just have to implement:
Try() - Actually sends the rpc to a server.
AnalyzeResponse() - Buckets the response into a few, common, categories.
Finish() - Handle (final) success or failure.

This also refactors WriteRpc to use the new class.

Change-Id: Iaa58bdc5656a5d4d9172885a67363f74718a0c8e
---
A CMakeCache.txt_dc5c3c4a-2596-4a01-9477-46a2ba634740
M src/kudu/client/batcher.cc
A src/kudu/rpc/retriable_rpc.h
M src/kudu/rpc/rpc.h
4 files changed, 509 insertions(+), 113 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/64/3064/2
-- 
To view, visit http://gerrit.cloudera.org:8080/3064
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iaa58bdc5656a5d4d9172885a67363f74718a0c8e
Gerrit-PatchSet: 2
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: David Ribeiro Alves <da...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins