Bug 1044116 - Upgrade mercurial version 2.5.3 -> 2.6.3 for running unit tests (in requirements.txt),r=aki
Bug 858797 - fx desktop builds - purge clobber windows fix, r=aki
Merge branch 'master' of https://github.com/mozilla/build-mozharness
Merge branch 'master' into build-cfg-integration