Fixed commons-io missing in lib directory + fixed wrong groupId of commons-io

This fixes the bug that commons-io was missing in the lib directory.

Furthermore, a wrong (outdated) groupId for commons-io was specified in pact-clients (the [old pom file](http://repo1.maven.org/maven2/org/apache/commons/commons-io/1.3.2/commons-io-1.3.2.pom) specifies the relocation). I also switched to the commons-io versions that is used by hadoop (2.1).