Make tests run again. Changed fully-qualified class names in source and test files.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/branches/configuration2-alpha@1624631 13f79535-47bb-0310-9956-ffa450edef68
Adapted class names in user guide to changed package names.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/branches/configuration2-alpha@1624635 13f79535-47bb-0310-9956-ffa450edef68