Service Catalog provisioning fails after moving to OpenShift ovs-multitenant plugin

Issue

All Service Catalog provisioning calls are failing after moving to ovs-multitenant SDN plugin:

3h          3h           1         jenkins-ephemeral-4llm9.1578dd1afa82ecc7   ServiceInstance               Warning   ErrorCallingProvision              service-catalog-controller-manager   Communication with the ClusterServiceBroker timed out; operation will be retried: Put https://apiserver.openshift-template-service-broker.svc:443/brokers/template.openshift.io/v2/service_instances/d18ee0b3-15c9-11e9-bd58-0a580a8100a5?accepts_incomplete=true: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)