update akanda devstack plugin post-stackforge retirement
update akanda devstack plugin post-stackforge retirement

Change-Id: I251f0bbc16774529da639b462a11296c9e67f1db

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