Cleanup gerritbot branches reporting to -infra
Cleanup gerritbot branches reporting to -infra

Some of our current branchs in the channels.yaml file are
stale. This patch cleans them up and adds the associated
repo as a comment to encourage consistent cleanup.

Change-Id: I52b0249f304c00655f1b617d52116e168fd3f349

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