Add mediawiki-history-metrics endpoints

Authored by JAllemandou on Aug 25 2017, 7:52 PM.

Description

Add mediawiki-history-metrics endpoints

This patch adds endpoints for mediawiki-history metrics,
using druid as a backend. It includes a utility file to
build druid queries, and a framework for testing the
endpoints against an emulated druid backend.

Bug: T175805
Change-Id: I339922acef7d2df406cbbfc7eae0bd0b1f2e6bf7

Details