In preparation for the library update of org.apache.commons:commons-collections4 to version 4.1, we add import to the dependency management section of magnolia-project so that the version of commons-collections4 is only managed in one place. Depending on the module this update includes removal of already existing deps in depMan section or addition of the dep to modules themselves. We also make sure that the changes build accordingly, as the actual update will happen upstream in magnolia-project.