Add openstackclient installation to the client class

The repo is inside the openstackclient plugin commands[1].

[1]https://docs.openstack.org/python-openstackclient/latest/cli/plugin-commands.html

Change-Id: I46eac78b8213cb5c3b61e2ae9e73c30d5fd420a1

manifests/client.pp

@@ -20,6 +20,7 @@ class octavia::client (
       name   => $::octavia::params::client_package_name,
       tag    => 'openstack',
     }
+    include '::openstacklib::openstackclient'
   } else {
     fail("There is no avaiable client package in osfamily: ${::osfamily}.")
   }

releasenotes/notes/add-openstackclient-client-ad889aef4a5c7322.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add openstackclient installation to the client class.

spec/classes/octavia_client_spec.rb

@@ -25,6 +25,7 @@ describe 'octavia::client' do
       )
     end
 
+    it { is_expected.to contain_class('openstacklib::openstackclient') }
   end
 
   on_supported_os({