Allow the environment to manage the Tor exit node manager's lifecycle.

service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java

@@ -454,6 +454,7 @@ public class WhisperServerService extends Application<WhisperServerConfiguration
     environment.lifecycle().manage(messagePersister);
     environment.lifecycle().manage(clientPresenceManager);
     environment.lifecycle().manage(currencyManager);
+    environment.lifecycle().manage(torExitNodeManager);
 
     AWSCredentials         credentials               = new BasicAWSCredentials(config.getCdnConfiguration().getAccessKey(), config.getCdnConfiguration().getAccessSecret());
     AWSCredentialsProvider credentialsProvider       = new AWSStaticCredentialsProvider(credentials);