Fix mailmap.
Fix mailmap.

Mailmap was broken in 01cec1dcb1a0b8d6a0ba098f8e18ab3c0f7cabab

Revert offending line only to get unit tests passing again.

Change-Id: I33e8d5d3587b429d44ae60f34ca2f132ce233793

openstack-attic/oslo.version,emonty/oslo.version