[BACKLOG-1574] - Add the ability to provide configuration to store the data source acl nodes.    Property aclNodeFolder added. Can be retrived via PentahoSystem.get( ISystemConfig.class ).getProperty(repository.aclNodeFolder);
Merge pull request #2151 from Pedro-Entrezede/BACKLOG-1574

[BACKLOG-1574] - Add the ability to provide configuration to store the data source acl nodes.