Add existing devstack plugins to the devstack plugin list
Add existing devstack plugins to the devstack plugin list

Change-Id: I336a4c652a78e778e39652f1f16ff69be10ab065

dirkmueller/devstack,samgoon/devstack,group-policy/devstack,nawawi/openstack,bswartz/devstack,bigswitch/devstack,dtroyer/devstack,bigswitch/devstack,richliu/devstack,Mahito/devstack,dtroyer/devstack,openstack-dev/devstack,noironetworks/devstack,nawawi/openstack,group-policy/devstack,dirkmueller/devstack,openstack-dev/devstack,samgoon/devstack,noironetworks/devstack,mssumanth/devstack,avvocatodemarchis/devstack,richliu/devstack,bswartz/devstack,mssumanth/devstack,avvocatodemarchis/devstack,Mahito/devstack