HBASE-10099 javadoc warning introduced by LabelExpander 188: warning - @return tag has no arguments

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1548725 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/LabelExpander.java

@@ -181,7 +181,7 @@ public class LabelExpander {
    * @param columnOffset
    * @param columnLength
    * @param cellVisibilityExpr
-   * @return
+   * @return KeyValue from the cell visibility expr
    * @throws IOException
    * @throws BadTsvLineException
    */
@@ -206,4 +206,4 @@ public class LabelExpander {
     }
     return kv;
   }
-}
+}