[CONFIGURATION-567] XMLBeanDeclaration now escapes node names.

When nested properties are processed the name of a child node used to be
directly passed to configurationAt(). This can fail if the node name contains
characters with a special meaning for the expression engine. Now node names
are escaped using the current expression engine.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1590424 13f79535-47bb-0310-9956-ffa450edef68
[CONFIGURATION-567] Updated changes.xml.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1590425 13f79535-47bb-0310-9956-ffa450edef68