An acceptance test needs to be added that exercises the overrides in `lib/puppet/provider/sshkey/augeas.rb`

[trevor-vaughan]

The lib/puppet/provider/sshkey/augeas.rb enhances the existing sshkey provider.

Prior to puppet 6, this worked seamlessly because the sshkey provider was loaded first.

However, since sshkey is now a separate module, I believe that the override is probably not working (have not explicitly checked) because augeasproviders_ssh comes before sshkey alphabetically.

The fix is probably to explicitly load the parent type prior to trying to load the override.