add logging for dispatching alerts completing

Author: thestinger

src/main/java/app/attestation/server/AlertDispatcher.java

@@ -241,6 +241,8 @@ protected PasswordAuthentication getPasswordAuthentication() {
                     logger.log(Level.WARNING, "database error", e);
                 }
             }
+
+            logger.info("dispatching alerts completed");
         }
     }
 }