fecf9c8 started to depend on parameters
only present in 7.0.0, but was merged before it could be added.

This makes it clear that 13.x is Foreman Proxy 2.0 only.

In Puppet 6.13.0 and 6.14.0 the system store is not used for file
content on HTTPS resources due to a regression tracked as
https://tickets.puppetlabs.com/browse/PUP-10365

Since puppetversion is not available via the command line, fact() can't
return it so testing for 6.14.0 isn't possible. That means the patch
needs to be reverted once it's fixed.

This uses the correct variable which means it'll only listen on HTTPS as
intended.

This define contains no OS logic and doesn't need facts so testing on
every OS is wasting time.

This doesn't convert all classes since the installer still relies on
rdoc groups. However, not all classes are public and this converts what
makes sense.

The parameter hasstatus has defaulted to true since Puppet 2.7.0 and
that's long been the minimum supported version.

The require is already ensured in init.pp.

This class is intended to allow overriding some parameters that
basically never change. This makes the parameters of init.pp slightly
easier to digest. It also allows testing of some modules by just
including params without the entire foreman_proxy class. This makes
tests faster but also more focused.

Setting the group can be useful if other processes need to read the
file, but for foreman-proxy this is not the case.

Rather than redefining the package prefix, this introduces the variable
in params.pp.

Since 5bde9c7 there is a variable that
explicitly sets the external core. Rather than copying the logic, this
reuses the variable.

This define introduced an abstraction for Foreman Proxy modules slightly
more explicit than just the settings_file.

This is an abstraction to clearly indicate a provider is being
configured. All built in providers are converted to use this.

This introduces a define for plugins that have a package and a config
file, which is most of them.

This additional abstraction makes it easier to configure plugins that
are providers when they follow conventions.

This moves the definition of foreman_proxy::feature from
foreman_proxy::settings_file to foreman_proxy::module. It also
simplified it by only passing a $module_enabled variable. This is still
needed because it needs to be in context for template().

this PR adds support for flatcar linux on the omaha smart proxy:
theforeman/smart_proxy_omaha#21
We need to add this as an option to the puppet module too.

This also changes the tests to AIO paths on AIO distros.

c57d7fc and possible Foreman itself
used this in the past, but is no longer needed.

This module doesn't support EL 6 or < EL 7.5. To verify it does work, an
acceptance test is added.

This makes it clearer how the variables flow.