puppet-os-hardening 2.2.0

Implemented enhancements:

• Test / Update for Puppet 6 #156
• Update test mechanisms #169 (mcgege)
• New option rpfilter_loose to enable loose mode (rp_filter = 2) #163 (mcgege)

Fixed bugs:

• Rhel 7 won't boot on physical server #165

Closed issues:

• Wrong permission on git project files ? #164
• module on the forge is not in sync with version of github #160
• Fix broken tests in Travis CI #123

Merged pull requests:

• Also works with current puppetlabs/stdlib (5.1.0 tested) #168 (mcgege)
• Do not disable vfat. Fixes #165. #166 (timstoop)
• Add support for Ubuntu 18.04 and SLES 15 in metadata.json #162 (mcgege)