Configure zuul to trigger jobs on special comments
Configure zuul to trigger jobs on special comments

Configure zuul to retrigger check jobs when a comment with just
'recheck' in the comment text is left on a change. Retrigger approval
jobs when a comment with just 'reverify' in the comment text is left
on a change.

Change-Id: If3d21b31f19fc84211703b8cad05654e3da16c48

openstack-infra/project-config,dongwenjuan/project-config,noorul/os-project-config,Tesora/tesora-project-config,anbangr/osci-project-config,citrix-openstack/project-config,open-switch/infra_project-config,coolsvap/project-config,osrg/project-config,noorul/os-project-config,dongwenjuan/project-config,open-switch/infra_project-config,Tesora/tesora-project-config,openstack-infra/project-config,anbangr/osci-project-config,osrg/project-config,coolsvap/project-config,citrix-openstack/project-config