Add channel #openstack-dib for diskimage-builder
Add channel #openstack-dib for diskimage-builder

It would be beneficial for the diskimage-builder project to have its own
IRC channel to focus efforts and have discussions on development. This
commit adds it to accessbot and gerritbot channel lists.

Change-Id: I9654843252859362c94a899c04274507cab1ff1d

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