Add DNF module management

[ekohl]

On EL8 and Fedora DNF can manage modules. This is a method of providing multiple versions on the same OS. Only one DNF module can be active at the same time.

[puppet-community-rangefinder]

postgresql::dnfmodule is a class

that may have no external impact to Forge modules.

postgresql::globals is a class

Breaking changes to this file WILL impact these 20 modules (exact match):

• nicopaez-dockerserver
• jmkeyes-razor
• landcareresearch-pidservice
• nnutter-testdb
• landcareresearch-postgis
• chedi-django
• nicopaez-alfred
• nicopaez-triage
• lwo-dataverse
• tailoredautomation-patroni
• stackstorm-st2
• mukaibot-bamboo
• maestrodev-maestro
• it2ndq-barman
• deric-barman
• npwalker-pe_external_postgresql
• puppetlabs-puppetdb
• SchnWalter-happydev
• groupbuddies-gb
• conzar-pidservice

Breaking changes to this file MAY impact these 2 modules (near match):

• jmkeyes-netbox
• ash-netbox

This module is declared in 70 of 576 indexed public Puppetfiles.

---

These results were generated with Rangefinder, a tool that helps predict the downstream impact of breaking changes to elements used in Puppet modules. You can run this on the command line to get a full report.

Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.

[ekohl]

I am running this on my own server and there it appears to work well.

[CLAassistant]

All committers have signed the CLA.

[Zak-Kent]

fwiw, when investigating Server-2500 and a workaround which was added for this issue in the PuppetDB and Puppetserver acceptance tests I found this pr. I was able to apply the changes here to my test setup and they resolved this issue we were seeing on RHEL-8. I don't have a good sense of what else might be impacted by these changes but once some flavor of this is merged we should be able to update the puppetlabs-puppetdb module to pick up this fix.

[sheenaajay]

Thanks @ekohl for your contribution as always.