Introduce $default_ca_path variable in certs::ca

This is reused a few times and makes it easier to follow what's related.

Author: ekohl

manifests/ca.pp

@@ -21,6 +21,7 @@
   String $ca_key_password = $certs::ca_key_password,
   Stdlib::Absolutepath $ca_key_password_file = $certs::ca_key_password_file,
 ) {
+  $default_ca_path = "${certs::ssl_build_dir}/${default_ca_name}.crt"
   $server_ca_path = "${certs::ssl_build_dir}/${server_ca_name}.crt"
 
   file { $ca_key_password_file:
@@ -56,7 +57,7 @@
   } else {
     file { $server_ca_path:
       ensure => file,
-      source => "${certs::ssl_build_dir}/${default_ca_name}.crt",
+      source => $default_ca_path,
       owner  => 'root',
       group  => 'root',
       mode   => '0644',
@@ -74,7 +75,7 @@
   if $deploy {
     file { $certs::katello_default_ca_cert:
       ensure => file,
-      source => "${certs::ssl_build_dir}/${default_ca_name}.crt",
+      source => $default_ca_path,
       owner  => 'root',
       group  => 'root',
       mode   => '0644',