Fix up circleci badge ref of Metaswitch to projectcalico
Fix up circleci badge ref of Metaswitch to projectcalico

Former-commit-id: 4c66eb0b752ddc765d9c100e99259444ee90ecf3
projectcalico/libnetwork-plugin,TrimBiggs/libnetwork-plugin,tomdee/libnetwork-plugin,TrimBiggs/libnetwork-plugin