Revert "Removed extraneous author javadocs"

This reverts commit 888abc9e2a.

src/main/java/org/kohsuke/github/GHThread.java

@@ -10,6 +10,7 @@ import java.util.Date;
 /**
  * A conversation in the notification API.
  *
+ * @author Kohsuke Kawaguchi
  * @see <a href="https://developer.github.com/v3/activity/notifications/">documentation</a>
  * @see GHNotificationStream
  */