Fix registrar client issue after rebasing

Signed-off-by: Sergio Arroutbi <sarroutb@redhat.com>

Author: sarroutbi

keylime/src/registrar_client.rs

@@ -257,6 +257,7 @@ impl RegistrarClientBuilder {
                 key: self.key.clone().unwrap_or_default(),
                 insecure: self.insecure,
                 timeout: self.timeout.unwrap_or(5000),
+                accept_invalid_hostnames: false,
             };
             https_client::get_https_client(&args)?
         } else {