Sync core reviewer list for Trove
Sync core reviewer list for Trove

Sync Trove core reviewer list so that it is now up-to-date. This
includes adding new core reviewers and dropping old ones we are no
longer active.

Change-Id: Ib7d95e4a4f8c75be6558119a0d6a1b8f35d1423e

cp16net/reviewstats,JohnGarbutt/reviewstats,openstack-infra/reviewstats,JohnGarbutt/reviewstats,openstack-infra/reviewstats,cp16net/reviewstats