tree 73877608b70d3d86740e32f503bba3fc547d2653
parent 775971cd5fbedd4fc251e9fb490f69b650b33587
author Antonio Barone <syntonyze@gmail.com> 1540567304 +0300
committer Luca Milanesio <luca.milanesio@gmail.com> 1542156700 -0800

Allow analytics to aggregate by branch

When extract-branches is set, the analytics plugin aggregates commits
also by branch name within the aggregation strategy established by the
`aggregation` argument. The aggregated branch is also exposed as a value
via the `branches` field of the response payload.

Also, Improve extraction of branches performance by computing a lookup
table only once rather than for every objectId.

This code is now dependent on gerrit-api version 2.16-rc1.

Feature: Issue 9863
Feature: Issue 9864
Bug: Issue 9924
Bug: Issue 9950

Change-Id: Ib2d58f8dda397af476a7307e90dc7466a7edff2c