Minor javadoc fixes

src/main/java/com/amazonaws/services/kinesis/clientlibrary/lib/worker/Worker.java

@@ -1046,7 +1046,7 @@ public class Worker implements Runnable {
         // Worker.run().
         leaseCoordinator.stop();
 
-        // Stop the leash cleanup manager
+        // Stop the lease cleanup manager
         leaseCleanupManager.shutdown();
 
         // Stop the periodicShardSyncManager for the worker

src/main/java/com/amazonaws/services/kinesis/leases/impl/LeaseCleanupManager.java

@@ -122,7 +122,7 @@ public class LeaseCleanupManager {
     }
 
     /**
-     * Starts the lease cleanup thread, which is scheduled periodically as specified by
+     * Stops the lease cleanup thread, which is scheduled periodically as specified by
      * {@link LeaseCleanupManager#leaseCleanupIntervalMillis}
      */
     public void shutdown() {