Install python3-designateclient in Fedora or RedHat > 7

Fedora repo [1] has python3 packages, start consuming those.

[1] http://trunk.rdoproject.org/fedora/puppet-passed-ci/

Change-Id: I598a9bd07d739063c9e7461a960b448baaf0e44d

manifests/client.pp

@@ -15,10 +15,9 @@
 class designate::client (
   $package_ensure = 'present',
   $client_package_name = $::designate::params::client_package_name,
-) {
+) inherits ::designate::params {
 
   include ::designate::deps
-  include ::designate::params
 
   package { 'python-designateclient':
     ensure => $package_ensure,

manifests/params.pp

@@ -5,7 +5,8 @@
 class designate::params {
   include ::openstacklib::defaults
 
-  if ($::os_package_type == 'debian') {
+  if ($::os_package_type == 'debian') or ($::os['name'] == 'Fedora') or
+      ($::os['family'] == 'RedHat' and Integer.new($::os['release']['major']) > 7){
     $pyvers = '3'
   } else {
     $pyvers = ''