Add Gerrit hooks change-owner and kind

Gerrit 2.10 contains new code review hooks --change-owner and
--kind [1] so this change is to update jeepyb to process those hooks.

[1] https://review-dev.openstack.org/Documentation/config-hooks.html

Change-Id: Ia2d3da1a369d7b0636ca9ab332d2a3a4044eb81c
4 files changed