Re-add async=False
Re-add async=False

neiljerram/felix,matthewdupre/felix,TrimBiggs/calico,neiljerram/felix,ocadotechnology/calico,matthewdupre/felix,neiljerram/felix,Metaswitch/calico,neiljerram/felix,alexhersh/calico,beddari/calico,anortef/calico,Metaswitch/calico,kasisnu/calico,anortef/calico,ocadotechnology/calico,beddari/calico,kasisnu/calico,alexhersh/calico,TrimBiggs/calico