Add support for Modulesync (#146)

• Add support for Modulesync

• Fix several lint issues

• Fix several rubocop issues

• Remove check for supported operating systems

• Remove parameter port, because it has a default value

• Remove parameter service_provider, because it is defined at params.pp

• Add default for parameters repo and cdhver, since this only affects RedHat

• Add parameter service_name

• Add parameter install_java and java_package

• Add parameter initialize_datastore

• Readd support for init scripts, because RedHat / CentOS 6 does not use systemd

• Add parameter service_provider, because Cloudera 5 does not provide a Systemd unit file