Bug 1007230 - Timeouts during pip install ("Error running install of package, /builds/slave/test/build/venv/bin/pip install --download-cache /builds/...", "Error running install of package, /builds/slave/talos-slave/test/build/venv/bin/pip install --download-cache..."),r=jlund
Bug 1049798 - Add sub-config for Linux64 code coverage builds, r=jlund
Bug 1053502 - Increase chunks for Android 2.3 mochitests (mozharness); r=kmoir
Bug 1017448 - Fix --disable-mock flag; r=jlund
Bug 1053197 - Failures during install_module() are shown as ERRORs in the log even though the run succeeded - part 1 of 2 - the fix (part 2 of 2 will be extra cleanup)
Bug 1045596 - Set tbpl status correctly when structured logger can't parse JSON input, r=jgriffin

--HG--
extra : source : bfa36e0f2c691d96bf27370e1cfee4d44b1d63f3
extra : amend_source : 7390d5592cb8aad0006d8fcac8f9f4ed7abd0ca8
backed out ProxxyMixin from mozharness.base.python; pulled mozilla master
updated class ordering in TestingMixin + pep8 fixes
ProxxyMixin is now a new-style class
VirtualenvMixin uses ProxxyMixin