Update the Ironic core team list
Update the Ironic core team list

Update the Ironic core team list.

Sean and Mikal were removed a while back, but I forgot to update this
list. Roman and Max were added last week.

Change-Id: I54858324b46dcbb69a259391c4cbc6b8a0c942e5

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