Add mitaka to gerritbot for OpenStack-Chef
Add mitaka to gerritbot for OpenStack-Chef

Change-Id: I499c936b1f6075c89437b672f648845e3ca4e00f

openstack-infra/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,dongwenjuan/project-config,openstack-infra/project-config,Tesora/tesora-project-config