[CONFIGURATION-524] CompositeConfiguration.clone() now ensures that the
configuration's interpolator is cloned, too.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1467448 13f79535-47bb-0310-9956-ffa450edef68
[CONFIGURATION-524] Updated changes.xml.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1467449 13f79535-47bb-0310-9956-ffa450edef68