Use correct CA variables in reverse proxy

[ehelms]

The removal of parameters in puppet-certs that were not used internally were used externally -- this updates to use current canonical parameters.

[ekohl]

Isn't this the certificate we expect on the remote server (so Foreman)? https://httpd.apache.org/docs/current/mod/mod_ssl.html#sslproxycacertificatefile states:

This directive sets the all-in-one file where you can assemble the Certificates of Certification Authorities (CA) whose remote servers you deal with. These are used for Remote Server Authentication. Such a file is simply the concatenation of the various PEM-encoded Certificate files, in order of preference. This can be used alternatively and/or additionally to SSLProxyCACertificatePath.

[evgeni]

Looking at theforeman/puppet-certs@9585baa:

$ca_cert = "${pki_dir}/certs/${default_ca_name}.crt"
$katello_default_ca_cert = "${pki_dir}/certs/${default_ca_name}.crt"

so this is an equivalent change

[ehelms]

For this change,to fix tests I think we keep it equivalent. As for your point, this change dates back a long, long time to #54.

The configuration is not setting SSLProxyVerify explicitly, where as we do set SSLClientVerify (granted to optional) so I am guessing this setting doesn't actually matter or do anything at the moment.

[ehelms]

Updated.