@Override
    public void onTenantDelete(TenantName tenant) {
        log.log(FINE, () -> TenantRepository.logPre(tenant) +
                            "Tenant deleted, removing request handler and cleaning host registry");
        tenants.remove(tenant);
    }
Returns the context for this request, or null if the server is not properly set up with handlers
configserver/src/main/java/com/yahoo/vespa/config/server/rpc/RpcServer.java