LANG_2_5
Rename LANG_2_5_COPY tag to LANG_2_5 - step three in reverting r931440
See http://svn.apache.org/viewvc?view=revision&revision=931440
    http://markmail.org/message/ghuxod3t3q5qyqye
    http://svn.apache.org/viewvc?view=revision&revision=931601
    http://svn.apache.org/viewvc?view=revision&revision=931603

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/tags/LANG_2_5@931604 13f79535-47bb-0310-9956-ffa450edef68