Renamed top-level package to configuration2. (This breaks the build.)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/branches/configuration2-alpha@1624601 13f79535-47bb-0310-9956-ffa450edef68
Adapted JavaCC source file to change of package name.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/branches/configuration2-alpha@1624602 13f79535-47bb-0310-9956-ffa450edef68
Adapted logger configuration.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/branches/configuration2-alpha@1624603 13f79535-47bb-0310-9956-ffa450edef68