Ensure Puppet 8 support

[ekohl]

To be done:

• Update puppetlabs-postgresql to >= 10 allow puppet-systemd >= 6 (puppetlabs/puppetlabs-postgresql@09d3849)
  • Mark compatible with puppetlabs/postgresql 10.x puppet-candlepin#248
  • Mark compatible with puppetlabs/postgresql 10.x puppet-foreman#1143
  • Mark compatible with puppetlabs/postgresql 10.x puppet-pulpcore#316
• Add Puppet 8 support voxpupuli/puppet-redis#484
• Mark compatible with Puppet 8 puppet-katello#484

[ekohl]

Note that because we don't install the modules before running tests, the glob ends up being an empty list. So the check doesn't fire off, which is why it's green.

[ekohl]

$ be rspec spec/puppet_version_spec.rb --format documentation
 
Puppet module
  apache
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  apt
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  candlepin
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  certs
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  concat
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  datacat
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  dhcp
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  dns
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  extlib
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  foreman
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  foreman_proxy
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  foreman_proxy_content
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  inifile
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  katello
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  mosquitto
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  postgresql
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  pulpcore
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  puppet
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  puppetserver_foreman
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  qpid
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  redis
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  stdlib
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  systemd
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  tftp
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  trusted_ca
    supports Puppet 7.9.0
    supports Puppet 8.0.0
  vcsrepo
    supports Puppet 7.9.0
    supports Puppet 8.0.0

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