[CODEC-174] Add removed method again and make it deprecated.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1542815 13f79535-47bb-0310-9956-ffa450edef68
[CODEC-174] Fix Clirr error by renaming new Methods "Map Rule.getInstance(...)" to "Map Rule.getInstanceMap(...)" and re-introducing the original methods with the original signature "List Rule.getInstance(...)" and returning a joined result of getInstanceMap.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1542823 13f79535-47bb-0310-9956-ffa450edef68